100 results on '"Nadasen A"'
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2. 2022 Progress Report for APLU's Powered by Publics. Based on Preliminary Data (Current as of March 31, 2023)
- Author
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Association of Public and Land-grant Universities (APLU), Michaels, J., Nadasen, D., Thornton, G., Rush-Marlowe, R., Frederick, A., Freelove-Kirk, T., and Chadwick, J.
- Abstract
The Powered by Publics (PxP) initiative has been an ambitious undertaking from the beginning, aiming to produce hundreds of thousands more undergraduate degrees and halving equity gaps for low-income, minoritized, and first-generation students by 2025. APLU has collected student performance data from the 127 participating institutions over the past three years--in 2020, 2021, and 2022--to evaluate progress toward these stretch goals. The purpose of this report is to document the network's progress and share examples of innovation emerging from cross-campus collaborations.
- Published
- 2023
3. Using Community College Prior Academic Performance to Predict Re-Enrollment at a Four-Year Online University
- Author
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Nadasen, Denise and List, Alexandra
- Abstract
Students' re-enrollment in the subsequent semester after their first semester at a four-year institution is a strong predictor of retention and graduation. This is especially true for students who transfer from a community college to a four-year institution because of the many external or non-academic factors influencing a student's decision to re-enroll. This research study examines student learner characteristics and course-taking behaviors at the community college and first-term GPA at a four-year institution to predict the likelihood of re-enrollment for 8,200 students from two community colleges who transferred to an online, public, four-year institution. The logistic regression models showed that gender, age, and first-term GPA at the four-year institution were significant predictors of re-enrollment. These findings contribute to the growing literature on transfer students and may provide researchers and practitioners a greater understanding of how community college factors influence the progression and success for transfer students at four-year institutions.
- Published
- 2016
4. Pedagogy and the Politics of Organizing in Mississippi
- Author
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Nadasen, Premilla
- Published
- 2020
5. Reaction and proton-removal cross sections of $^6$Li, $^7$Be, $^{10}$B, $^{9,10,11}$C, $^{12$N, $^{13,15}$O and $^{17}$Ne on Si at 15 to 53 MeV/nucleon
- Author
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Warner, R. E., Carstoiu, F., Brown, J. A., Becchetti, F. D., Davids, B., Galonsky, A., Horoi, M., Kolata, J. J., Nadasen, A., Roberts, D. A., Ronningen, R. M., Samanta, C., Schwarzenberg, J., Steiner, M., and Subotic, K.
- Subjects
Nuclear Experiment - Abstract
Excitation functions for total reaction cross sections, $\sigma_R$, were measured for the light, mainly proton-rich nuclei $^6$Li, $^7$Be, $^{10}$B, $^{9,10,11}$C, $^{12}$N, $^{13,15}$O, and $^{17}$Ne incident on a Si telescope at energies between 15 and 53 MeV/nucleon. The telescope served as target, energy degrader and detector. Proton-removal cross sections, $\sigma_{2p}$ for $^{17}$Ne and $\sigma_p$ for most of the other projectiles, were also measured. The strong absorption model reproduces the $A$-dependence of $\sigma_R$, but not the detailed structure. Glauber multiple scattering theory and the JLM folding model provided improved descriptions of the measured $\sigma_R$ values. $rms$ radii, extracted from the measured $\sigma_R$ using the optical limit of Glauber theory, are in good agreement with those obtained from high energy data. One-proton removal reactions are described using an extended Glauber model, incorporating second order noneikonal corrections, realistic single particle densities, and spectroscopic factors from shell model calculations., Comment: 16 pages, 6 figures
- Published
- 2005
- Full Text
- View/download PDF
6. Generalized Isoscaling of Isotopic Distributions
- Author
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Shomin, R., Tsang, M. B., Bjarki, O., Gelbke, C. K., Kunde1, G. J., Lemmon, R. C., Lynch, W. G., Magestro, D., Popescu, R., Vandermolen, A. M., Verde, G., Westfall, G. D., Xi, H. F., Friedman, W. A., Imme, G., Maddalena, V., Nociforo, C., Raciti, G., Riccobene, G., Romano, F. P., Saija, A., Sfienti, C., Fritz, S., Gross, C., Odeh, T., Schwarz, C., Nadasen, A., Sisan, D., and Rao, K. A. G.
- Subjects
Nuclear Experiment - Abstract
Generalized isoscaling relationships are proposed that may permit one to relate the isotopic distributions of systems that may not be at the same temperature. The proposed relationships are applied to multifragmentation excitation functions for central Kr+Nb and Ar+Sc collisions., Comment: 20 pages, 5 figures
- Published
- 2002
7. Expanding the Boundaries of the Women's Movement: Black Feminism and the Struggle for Welfare Rights
- Author
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Nadasen, Premilla
- Published
- 2002
- Full Text
- View/download PDF
8. Is It Time to Jump Ship? Historians Rethink the Waves Metaphor
- Author
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Laughlin, Kathleen A., Gallagher, Julie, Cobble, Dorothy Sue, Boris, Eileen, Nadasen, Premilla, Gilmore, Stephanie, and Zarnow, Leandra
- Published
- 2010
- Full Text
- View/download PDF
9. Rethinking Care Work: (Dis)Affection and the Politics of Caring
- Author
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Premilla Nadasen
- Subjects
Politics ,Affection ,media_common.quotation_subject ,Care work ,Gender studies ,General Medicine ,Sociology ,media_common - Published
- 2021
- Full Text
- View/download PDF
10. Mississippi Semester: New Social Justice Approach to Teaching Empirical Reasoning in Context
- Author
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Premilla Nadasen, Fatima Koli, Alisa B. Rod, and David Weiman
- Subjects
social justice ,quantitative data ,pedagogy ,economic security index ,Special aspects of education ,LC8-6691 ,Mathematics ,QA1-939 - Abstract
Under the direction of Professor Premilla Nadasen at Barnard College, the course “Mississippi Semester,” brings together a small group of undergraduate students in a collaborative action-driven project with Mississippi Low-Income Child-Care Initiative, an advocacy organization of women on welfare and child-care providers, based in Biloxi, MS. Students worked closely with members of Mississippi Low-Income Child-Care Initiative to develop an Economic Security Index for women in Mississippi which the organization will use to educate their constituency and to further their advocacy work.. We have partnered with the Barnard Empirical Reasoning Center to utilize census data and GIS to digitally map the information. We spent seven days in Mississippi to participate in community meetings to get feedback on the economic security index, conduct interviews with residents about their experiences with poverty, and meet with state legislators. Upon returning to New York, students engaged in post-trip recalibration of the index and prepare op-eds for publication. In addition to the history of welfare, students learned survey and interview techniques, GIS mapping, how to write op-eds and will develop a relationship with low-income women. This is an example of how collective community/faculty/student collaboration can equip students with concrete skills and teach them about public policy and community organizing, while simultaneously providing a service to an under-resourced organization. Though this course focused on the state of child care, race relations, economic inequality, and welfare in Mississippi, it offers a new pedagogical approach that can be used as a template for students and educators who desire to engage with contemporary social justice issues. This class flipped the traditional classroom because it was organized around the needs of the community organization rather than an academic research agenda and laid the foundation for a long-term campus-community collaboration. In addition to fostering greater understanding between those inside and outside the academy, it presents a horizontal and collaborative relationship between teacher and students, in which students took charge of and provided leadership around various components of this project. In this way, the course offered multiple approaches to contributing to a social justice agenda.
- Published
- 2019
- Full Text
- View/download PDF
11. Using Community College Prior Academic Performance to Predict Re-Enrollment at a Four-Year Online University
- Author
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Denise D Nadasen and Alexandra List
- Subjects
Online ,reenrollment ,persistence ,student success ,predictive analytics ,transfer students ,Theory and practice of education ,LB5-3640 - Abstract
Students’ re-enrollment in the subsequent semester after their first semester at a four-year institution is a strong predictor of retention and graduation. This is especially true for students who transfer from a community college to a four-year institution because of the many external or non-academic factors influencing a student’s decision to re-enroll. This research study examines student learner characteristics and course-taking behaviors at the community college and first-term GPA at a four-year institution to predict the likelihood of re-enrollment for 8,200 students from two community colleges who transferred to an online, public, four-year institution. The logistic regression models showed that gender, age, and first-term GPA at the four-year institution were significant predictors of re-enrollment. These findings contribute to the growing literature on transfer students and may provide researchers and practitioners a greater understanding of how community college factors influence the progression and success for transfer students at four-year institutions.
- Published
- 2016
- Full Text
- View/download PDF
12. Awareness of diabetes mellitus among African traditional healers in the Nelson Mandela Metropole
- Author
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Mea van Huyssteen, Millidhashni Reddy, Nadasen T Naidoo, Shirley-Anne Boschmans, Jane McCartney, and Maryna van de Venter
- Subjects
Public aspects of medicine ,RA1-1270 - Abstract
Diabetes mellitus, a chronic illness, affects approximately 8% of black South Africans. Traditional healers are an integral part of the lifestyle of the African people. Opsomming Diabetes mellitus, 'n chroniese siekte, affekteer na raming 8% van Suid-Afrika se swart bevolking. Tradisionele genesers is 'n integrale deel van die lewenswyse van dié bevolkingsgroep. *Please note: This is a reduced version of the abstract. Please refer to PDF for full text.
- Published
- 2004
- Full Text
- View/download PDF
13. Mississippi Semester: New Social Justice Approach to Teaching Empirical Reasoning in Context
- Author
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David Weiman, Fatima Koli, Alisa B. Rod, and Premilla Nadasen
- Subjects
lcsh:LC8-6691 ,pedagogy ,lcsh:Special aspects of education ,lcsh:Mathematics ,Context (language use) ,lcsh:QA1-939 ,Social justice ,Education ,Mathematics (miscellaneous) ,Pedagogy ,ComputingMilieux_COMPUTERSANDEDUCATION ,social justice ,quantitative data ,economic security index ,Sociology - Abstract
Under the direction of Professor Premilla Nadasen at Barnard College, the course “Mississippi Semester,” brings together a small group of undergraduate students in a collaborative action-driven project with Mississippi Low-Income Child-Care Initiative, an advocacy organization of women on welfare and child-care providers, based in Biloxi, MS. Students worked closely with members of Mississippi Low-Income Child-Care Initiative to develop an Economic Security Index for women in Mississippi which the organization will use to educate their constituency and to further their advocacy work.. We have partnered with the Barnard Empirical Reasoning Center to utilize census data and GIS to digitally map the information. We spent seven days in Mississippi to participate in community meetings to get feedback on the economic security index, conduct interviews with residents about their experiences with poverty, and meet with state legislators. Upon returning to New York, students engaged in post-trip recalibration of the index and prepare op-eds for publication. In addition to the history of welfare, students learned survey and interview techniques, GIS mapping, how to write op-eds and will develop a relationship with low-income women. This is an example of how collective community/faculty/student collaboration can equip students with concrete skills and teach them about public policy and community organizing, while simultaneously providing a service to an under-resourced organization. Though this course focused on the state of child care, race relations, economic inequality, and welfare in Mississippi, it offers a new pedagogical approach that can be used as a template for students and educators who desire to engage with contemporary social justice issues. This class flipped the traditional classroom because it was organized around the needs of the community organization rather than an academic research agenda and laid the foundation for a long-term campus-community collaboration. In addition to fostering greater understanding between those inside and outside the academy, it presents a horizontal and collaborative relationship between teacher and students, in which students took charge of and provided leadership around various components of this project. In this way, the course offered multiple approaches to contributing to a social justice agenda.
- Published
- 2019
14. Introduction: Historicizing Domestic Workers' Resistance and Organizing
- Author
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Premilla Nadasen and Eileen Boris
- Subjects
Organizational Behavior and Human Resource Management ,History ,Resistance (ecology) ,Political science ,Development economics - Published
- 2015
- Full Text
- View/download PDF
15. Participatory Risk Assessment of Tourism Development in Coastal Areas: Challenges and Implications for Management on the KwaZulu-Natal Coast
- Author
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Fathima Ahmed and Naadira Nadasen
- Subjects
Land use ,business.industry ,media_common.quotation_subject ,05 social sciences ,Environmental resource management ,Legislation ,030206 dentistry ,General Medicine ,050601 international relations ,0506 political science ,Ecosystem services ,03 medical and health sciences ,Social dynamics ,0302 clinical medicine ,Geography ,Ecotourism ,Environmental impact assessment ,Psychological resilience ,business ,Environmental planning ,Tourism ,media_common - Abstract
Geographic concentration of coastal tourism and its associated development impacts are strongly associated with proximity to the littoral zone. Concurrently, this is an area where normative collaboration, policy and science rarely coincide. Poor understandings of interlinks between coastal ecosystems by both pu blic and private entities has led to short-sighted tourist investment which fails to consider beach capacity or resource constraints. The results are the loss of ecosystem services which critically impair the resilience of coastlines, making them susceptible to natural and climate-related risks. Concerns and contestations over natura l resources are entrenched in ecological, economic and social dynamics. However tourism tends to favour the economic, which is inadequate. The potential for high-income, mass and ecotourism is huge along the KwaZulu-Natal coastline which is relatively undeveloped. The objective of this study emphasizes a participatory risk assessment of the tourism sector by interrogating land use-ecology interactions as necessary for optimal relationships between coastal uses and protection of coastal ecosystems. Key findings reveal that there are stressors acti ng cumulatively on individual ecosystems, thus the need to adopt a strategic view to management. Furthermore, the tourism footprint emerged as being larger than the industry itself, implying the potential benefits of integ ration across different sectors, stakeholders and legislation along the coast, with regard to tourism and its associated development.
- Published
- 2013
- Full Text
- View/download PDF
16. 'Everything Happened So Quickly' Living Through Events Immediately Before and After Initial Breast Cancer Diagnosis: An Exploratory Study of the Experiences of a Group of Women in Cape Town, South Africa
- Author
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Krishnavelh Kathleen Nadasen
- Subjects
medicine.medical_specialty ,030504 nursing ,business.industry ,medicine.medical_treatment ,Lumpectomy ,Exploratory research ,Alternative medicine ,Qualitative property ,medicine.disease ,03 medical and health sciences ,0302 clinical medicine ,Breast cancer ,030220 oncology & carcinogenesis ,Family medicine ,Cape ,medicine ,Thematic analysis ,0305 other medical science ,business ,Mastectomy - Abstract
This article provides information on an aspect of the author’s research on colored women’s experiences of breast cancer and deals specifically with events immediately before and after the initial diagnosis. The experiences of this group of South African women have remained largely undocumented. Individual in-depth interviews were conducted with 30 colored women. Qualitative data were collected and analyzed using thematic content analysis. The main themes that emerged relate to the discovery of the lump, reaction time, response to diagnosis, the question of whether a lumpectomy or a mastectomy should be conducted, counseling and family reactions. The findings show, inter alia, that these women are not accorded sufficient time to deal with the magnitude of the diagnosis and that access to appropriate counseling is insufficient. This study has implications for health professionals and for women in general and suggests further areas of investigation within the field of breast cancer research.
- Published
- 2017
- Full Text
- View/download PDF
17. Patients with type 2 diabetes and difficulties associated with initiation of insulin therapy in a public health clinic in Durban
- Author
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Mergan Naidoo and Dayanandan Manival Nadasen
- Subjects
Oral treatment ,medicine.medical_specialty ,Pediatrics ,Early introduction ,business.industry ,Insulin ,medicine.medical_treatment ,Public health ,Public Health, Environmental and Occupational Health ,Type 2 diabetes ,Disease ,medicine.disease ,Community health ,medicine ,Physical therapy ,Observational study ,Family Practice ,business - Abstract
Objectives: Many patients with type 2 diabetes are uncontrolled on maximum oral treatment. The early introduction of insulin can lower diabetes-related complications. The purpose of this study was to explore the reasons behind a perceived reluctance of patients with type 2 diabetes to commence insulin therapy despite objective evidence for the augmentation of oral treatment with insulin. Secondary objectives were to review the demographic data of these patients, to review the patients' knowledge of their disease and of insulin and to compare the knowledge and difficulties of those who agreed to be initiated on insulin with that of those who refused.Design: The study used an observational analytical design. All uncontrolled patients with type 2 diabetes on maximum oral therapy were interviewed using face-to-face interviews with open- and closed-ended questions.Setting and subjects: The study was conducted over a three-month period at the Phoenix Community Health Centre, a state-run institution, in ...
- Published
- 2012
- Full Text
- View/download PDF
18. DOMESTIC WORKERS ORGANIZE!
- Author
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Eileen Boris and Premilla Nadasen
- Subjects
Economic growth ,Praxis ,business.industry ,Labour law ,media_common.quotation_subject ,Legislation ,General Medicine ,Public administration ,Power (social and political) ,Work (electrical) ,Social history ,Sociology ,business ,Tertiary sector of the economy ,Social movement ,media_common - Abstract
This article traces the history of domestic worker organizing in the U.S. It challenges the long-standing assumption that these—primarily women of color—cleaners, nannies, and elder care providers are unorganizable and assesses the possibilities and limitations of recent organizing efforts. The nature of the occupation—its location in the home, the isolated character of the work, informal arrangements with employers, and exclusions from labor law protection—has fostered community-based, social movement organizing to build coalitions, reform legislation and draw public attention to the plight of domestic workers. Their successes, as well as the obstacles they encounter, hold lessons for other low-wage service sector workers in a new global economy. Domestic workers have integrated an analysis of race, class, culture, and gender—a form of social justice feminism—into their praxis, thus formulating innovative class-based strategies. Yet long-term reform has remained elusive because of their limited power to shape state policy.
- Published
- 2008
- Full Text
- View/download PDF
19. Valuing Domestic Work
- Author
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Premilla Nadasen, Premilla Nadasen, Tiffany Williams, Premilla Nadasen, Premilla Nadasen, and Tiffany Williams
- Abstract
This report is based on a three-year collaboration with Domestic Workers United (DWU) and the National Domestic Workers Alliance (NDWA). BCRW was proud to host the first National Domestic Workers Alliance congress at Barnard College in 2008 and subsequently the first East Coast Regional Congress in 2009. Together BCRW, DWU, and NDWA developed this publication in order to further knowledge about the processes by which domestic work has been devalued historically and how we can all work together to make domestic work safe, fair, and protected.
- Published
- 2010
20. The Sex of Class: Women Transforming American Labor
- Author
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P. Nadasen
- Subjects
History ,Class (computer programming) ,Sociology and Political Science ,Industrial relations ,Gender studies ,Sociology - Published
- 2008
- Full Text
- View/download PDF
21. Reaction cross sections in Si of light proton-halo candidates 12N and 17Ne
- Author
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D.A. Roberts, R. M. Ronningen, J.A. Zimmerman, J. von Schwarzenberg, M. Steiner, T.W. O'Donnell, Chhanda Samanta, J. Wang, A. Nadasen, Jon J. Kruse, J. J. Kolata, Aaron Galonsky, J. Woodroffe, J. A. Brown, B. Davids, H. Thirumurthy, F. D. Becchetti, M. Y. Lee, K. Subotic, P. Schwandt, and R. E. Warner
- Subjects
Physics ,Nuclear and High Energy Physics ,Proton ,010308 nuclear & particles physics ,Nuclear Theory ,7. Clean energy ,01 natural sciences ,3. Good health ,Nuclear physics ,0103 physical sciences ,Physics::Accelerator Physics ,Nuclear cross section ,Halo ,Atomic physics ,Nuclear Experiment ,010306 general physics - Abstract
Total reaction cross sections, σ R , on Si were measured near 40 A MeV for the proton-halo candidate 12 N and the two-proton-halo candidate 17 Ne, and were compared with σ R for other light proton-rich nuclei. The A -dependence shows enhanced σ R 's for 12 N and 17 Ne, relative to their neighbors, but the effect is smaller than for 8 B which has been argued to have a proton halo. In general, nuclei with loosely bound last protons ( S p ⩽ 1.5 MeV) have significantly larger σ R 's than their neighbors. Cross sections for charge-removal from 12 N and 17 Ne also were obtained.
- Published
- 1998
- Full Text
- View/download PDF
22. Mississippi Semester: New Social Justice Approach to Teaching Empirical Reasoning in Context.
- Author
-
Nadasen, Premilla, Koli, Fatima, Rod, Alisa B., and Weiman, David
- Subjects
SOCIAL justice ,RACE relations ,ECONOMIC security - Abstract
Under the direction of Professor Premilla Nadasen at Barnard College, the course "Mississippi Semester," brings together a small group of undergraduate students in a collaborative action-driven project with Mississippi Low-Income Child-Care Initiative, an advocacy organization of women on welfare and child-care providers, based in Biloxi, MS. Students worked closely with members of Mississippi Low-Income Child-Care Initiative to develop an Economic Security Index for women in Mississippi which the organization will use to educate their constituency and to further their advocacy work.. We have partnered with the Barnard Empirical Reasoning Center to utilize census data and GIS to digitally map the information. We spent seven days in Mississippi to participate in community meetings to get feedback on the economic security index, conduct interviews with residents about their experiences with poverty, and meet with state legislators. Upon returning to New York, students engaged in post-trip recalibration of the index and prepare op-eds for publication. In addition to the history of welfare, students learned survey and interview techniques, GIS mapping, how to write op-eds and will develop a relationship with low-income women. This is an example of how collective community/faculty/student collaboration can equip students with concrete skills and teach them about public policy and community organizing, while simultaneously providing a service to an under-resourced organization. Though this course focused on the state of child care, race relations, economic inequality, and welfare in Mississippi, it offers a new pedagogical approach that can be used as a template for students and educators who desire to engage with contemporary social justice issues. This class flipped the traditional classroom because it was organized around the needs of the community organization rather than an academic research agenda and laid the foundation for a long-term campus-community collaboration. In addition to fostering greater understanding between those inside and outside the academy, it presents a horizontal and collaborative relationship between teacher and students, in which students took charge of and provided leadership around various components of this project. In this way, the course offered multiple approaches to contributing to a social justice agenda. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
23. Absence of saturation in energy deposition in collisions at E = 15–115 AMeV
- Author
-
Eugene Gualtieri, R. Pak, A. M. Vander Molen, A. Nadasen, W. J. Llope, E. Norbeck, J. Yee, Sherry Yennello, T. Li, G. D. Westfall, N. T. B. Stone, J. S. Winfield, S. Hannuschke, R. Lacey, and Darren Craig
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Range (particle radiation) ,Fission ,Atomic physics ,Nuclear Experiment ,Saturation (chemistry) ,Deposition (chemistry) ,Excitation ,Energy (signal processing) ,Charged particle - Abstract
Fission fragment (FF), intermediate mass fragment (IMF), and light charged particle (LCP) production have been measured in 40 Ar + 232 Th collisions at E = 15–115 AMeV with the Michigan State University 4π Array. Trends in IMF and LCP production and in calculated excitation energy indicate there is no saturation in the deposited energy in central collisions of this system in the bombarding energy range studied.
- Published
- 1995
- Full Text
- View/download PDF
24. Introduction.
- Author
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Nadasen, Premilla
- Abstract
An introduction is presented in which the editor discusses articles in the issue on topics including Dána-Ain Davis's "Reproductive Injustice," highlighting issues of Black women's maternal health and reproductive justice.
- Published
- 2023
25. High-order azimuthal correlation functions: powerful probes for collective motion in heavy ion reactions
- Author
-
S. Hannuschke, N. T. B. Stone, T. Li, A. Nadasen, Eugene Gualtieri, A. Moores, Darren Craig, E. Norbeck, R. Pak, G. D. Westfall, J. Yee, W. J. Llope, A. Elmaani, A. M. Vander Molen, J. Lauret, Roy A. Lacey, R. S. Tickle, and A. Tsepetis
- Subjects
Azimuth ,Physics ,Nuclear and High Energy Physics ,Flow (mathematics) ,Collective motion ,Heavy ion ,High order ,Atomic physics ,Nuclear Experiment ,Rotation ,Characterization (materials science) - Abstract
We have investigated the utility of high-order azimuthal correlation functions as probes of collective motion from both rotation and flow at intermediate energies. Reaction simulations indicate new and distinct signatures for rotational collective motion which are important for its characterization and its distinction from collective flow. For the system Ar + Sc(35−115A MeV), experimental high-order correlation functions are used for a clear demonstration of the disappearance of collective flow at 93±4 A MeV. The method is direct and circumvents reaction-plane assignment.
- Published
- 1994
- Full Text
- View/download PDF
26. Impact parameter dependence of high energy gamma ray production in heavy-ion collisions
- Author
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B. M. Young, R. Pfaff, W. Benenson, J. Stevenson, M. F. Mohar, J. Clayton, T. Reposeur, A. Nadasen, J. S. Winfield, A. M. Vander Molen, Stephan Howden, J. Karn, D. Krofcheck, C. A. Ogilvie, David J. Morrissey, M. Cronqvist, G. D. Westfall, S. Hannuschke, and K. Wilson
- Subjects
Physics ,Nuclear and High Energy Physics ,Photon ,Nuclear Theory ,Gamma ray ,Inverse ,Charge (physics) ,Collision ,Coincidence ,Nuclear physics ,Impact parameter ,Atomic physics ,Nuclear Experiment ,Energy (signal processing) - Abstract
High energy photons ( E γ ⩾30 MeV) have been measured in coincidence with light particles observed in a multidetector array for the 40 Ar+ 51 V system at a bombarding energy of E A =65 MeV . Double differential cross sections were obtained as a function of the midrapidity charge representation of the centrality of the collision. The inverse slope parameter increases with centrality more strongly than predicted by a BUU model.
- Published
- 1992
- Full Text
- View/download PDF
27. Non-spin-flip (3He, t) charge-exchange and isobaric analog states of actinide nuclei studied at and 200 MeV
- Author
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G. Brouwer, R. Sawafta, E. J. Stephenson, S.Y. van der Werf, M.B. Greenfield, J.M. Schippers, A.M. van den Berg, D. Stewart, Fredrick D. Becchetti, A. Nadasen, J. W. Jänecke, G.P.A. Berg, D.A. Roberts, M.A. Hofstee, and Muhsin N. Harakeh
- Subjects
Physics ,Nuclear reaction ,Nuclear and High Energy Physics ,Isovector ,Isospin ,Nuclear Theory ,Coulomb ,Isobaric process ,Resonance ,Spin-flip ,Atomic physics ,Nuclear Experiment ,Spectral line - Abstract
The (He-3, t) charge-exchange reaction has been studied at theta = 0-degree-C and bombarding energies of E(He-3) = 76.5 MeV and 200 MeV. Spectra were measured using magnetic analysis for target nuclei of C-12, C-13, O-16, F-19, Si-28, Si-29, Si-30, Zr-90, Sn-117, Sn-120, (nat)Ta, (nat)W, Au-197, Pb-208, Th-230, Th-232, U-234, U-236, U-238 and Pu-244. The measurements at 76.5 MeV concentrated on the isobaric analog states of several actinide nuclei, particularly on their widths and the branching ratios for proton decay. Cross sections, Q-values and total widths were determined for the transitions to the isobaric analog states. Coulomb displacement energies derived from the measured Q-values display the influence of deformed nuclear shapes. Escape widths GAMMA-up and spreding widths GAMMA-down of the isobaric analog states in five actinide nuclei were deduced from the measured proton-decay branching ratios. They were found to be in agreement with predictions which postulate isospin mixing via the Coulomb force with the (T0-1)-component of the isovector giant monopole resonance. The measurements at 200 MeV were concerned with transitions to isobaric analog states in both light and heavy nuclei, including several actinide nuclei, but Gamow-Teller resonances and transitions to numerous other states were also observed. The measured cross sections for several transitions to isobaric analog states from Si-30 to Pb-208 were used to extract the effective interaction V(tau) for non-spin-flip (He-3, t) charge exchange at E(He-3) almost-equal-to 200 MeV. The interaction strength V(tau) decreases by a factor 0.6 when compared to previously measured values for the energy range E(He-3) = 65 to 90 MeV. An angular distribution from theta(t) = 0-degree to 16-degrees for the transition to the isobaric analog state in Sb-120 measured at E(He-3) = 200 MeV was found to be in very good agreement with microscopic calculations.
- Published
- 1991
- Full Text
- View/download PDF
28. Proton removal fromB8,C9, andC12on Si at20–70MeV∕nucleon
- Author
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P. D. Zecher, A. Nadasen, J. A. Tostevin, Aaron Galonsky, R. E. Warner, F. D. Becchetti, J. A. Brown, J. S. Winfield, J. H. Kelley, and R. M. Ronningen
- Subjects
Physics ,Nuclear and High Energy Physics ,Particle physics ,Proton ,SHELL model ,Nucleon ,Energy (signal processing) - Abstract
A Si detector telescope, in which alternating thick and thin Si elements served as both targets and detectors, was used to measure the energy dependence of the inclusive one-proton-removal cross sections ${\ensuremath{\sigma}}_{1p}$ of $^{8}\mathrm{B}$, $^{9}\mathrm{C}$, and $^{12}\mathrm{C}$ on a Si target. A similar detector telescope was used to measure both ${\ensuremath{\sigma}}_{1p}$ and ${\ensuremath{\sigma}}_{2p}$ for $^{9}\mathrm{C}$; ${\ensuremath{\sigma}}_{2p}$ of $^{9}\mathrm{C}$ is more than twice as large as ${\ensuremath{\sigma}}_{1p}$ of $^{9}\mathrm{C}$ and almost as large as ${\ensuremath{\sigma}}_{1p}$ of $^{8}\mathrm{B}$. The measurements were compared with shell model calculations using eikonal reaction theory. The quenching factors ${R}_{s}$ (the ratio of the measurement to the theoretical prediction) for $^{8}\mathrm{B}$ and $^{9}\mathrm{C}$ were near unity, as at higher energies. They also agreed with those measured recently for those nuclei on a C target at $75\phantom{\rule{0.3em}{0ex}}\text{MeV}∕\text{nucleon}$. For $^{12}\mathrm{C}$ the quenching is greater with ${R}_{s}=0.44\ifmmode\pm\else\textpm\fi{}0.03$. This is comparable to the value $0.53\ifmmode\pm\else\textpm\fi{}0.02$ deduced at energies above $1\phantom{\rule{0.3em}{0ex}}\text{GeV}∕\text{nucleon}$.
- Published
- 2004
- Full Text
- View/download PDF
29. A Profile of Female Genital Mutilation (FGM) and Human Rights
- Author
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Nadasen, Kathy
- Subjects
Tvärvetenskapliga studier inom samhällsvetenskap ,Social Sciences Interdisciplinary - Abstract
First edition, printed version 2003Second edition, electronic version 2018
- Published
- 2003
30. Generalized Isoscaling of Isotopic Distributions
- Author
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C. Sfienti, C. Nociforo, W. A. Friedman, C. K. Gelbke, S. Fritz, Gary Westfall, G. Imme, R. Shomin, G. J. Kunde, A. M. VanderMolen, D. J. Magestro, O. Bjarki, Daniel R. Sisan, Cornelius Schwarz, Giuseppe Verde, C. Groß, Hongfei Xi, A. Saija, T. Odeh, G. Raciti, R. Popescu, V. Maddalena, M. B. Tsang, R. Lemmon, W. G. Lynch, Francesco Romano, K. A. G. Rao, A. Nadasen, and G. Riccobene
- Subjects
Physics ,Nuclear and High Energy Physics ,Phase transition ,NUCLEUS-NUCLEUS COLLISIONS ,CENTRAL AU+AU COLLISIONS ,WIDELY SEPARATED STATES ,HEAVY-ION COLLISIONS ,EMISSION TIME SCALES ,GAS PHASE-TRANSITION ,ENERGY-LEVELS ,LIGHT-NUCLEI ,TEMPERATURE-MEASUREMENTS ,STATISTICAL MULTIFRAGMENTATION ,Photon ,FOS: Physical sciences ,Charge (physics) ,Observable ,Nuclear matter ,Breakup ,Spectral line ,Atomic physics ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment ,Excitation ,Nuclear Physics - Abstract
Generalized isoscaling relationships are proposed that may permit one to relate the isotopic distributions of systems that may not be at the same temperature. The proposed relationships are applied to multifragmentation excitation functions for central Kr+Nb and Ar+Sc collisions., 20 pages, 5 figures
- Published
- 2002
- Full Text
- View/download PDF
31. Proton elastic scattering potentials: Energy and isospin dependence
- Author
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Nadasen, A, Balaji, K R S, Brace, J, Rao, K A G, Roos, P G, Schwandt, P, and Ndefru, J T
- Subjects
Nuclear Physics - Published
- 2002
32. Total reaction and neutron-removal cross sections of 30A - 60A MeV He and Li Isotopes on Pb
- Author
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Warner, R E, McKinnon, M H, Shaner, N C, Becchetti, F D, Nadasen, A, Roberts, D A, Brown, J A, Galonsky, A, Kolata, J J, Ronningen, R M, Steiner, M, and Subotic, K M
- Subjects
Nuclear Physics - Published
- 2000
33. Participatory Risk Assessment of Tourism Development in Coastal Areas: Challenges and Implications for Management on the KwaZulu-Natal Coast
- Author
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Ahmed, Fathima, primary and Nadasen, Naadira, additional
- Published
- 2013
- Full Text
- View/download PDF
34. Non-spin-flip (3He, t) charge-exchange and isobaric analog states of actinide nuclei studied at [theta] 0[deg], E(3He) = 76 MeV and 200 MeV.
- Author
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Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA, Department of Natural Sciences, University of Michigan, Dearborn, MI 48128, USA, No department found, Kernfysisch Versneller Instituut, Zernikelaan 25, 9747 AA, Groningen, The Netherlands, He) = 200 MeV was found to be in very good agreement with microscopic calculations., Department of Physics, Florida A & M University, Tallahassee, FL 32306, USA, Faculteit Natuurkunde en Sterrenkunde, Vrije Universiteit, de Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands, Janecke, J., Becchetti, Fredrick D., Van den Berg, A.M., Berg, G.P.A., Brouwer, G., Greenfield, M.B., Harakeh, M.N., Hofstee, M.A., Nadasen, A., Roberts, Donald A., Department of Physics, University of Michigan, Ann Arbor, MI 48109, USA, Department of Natural Sciences, University of Michigan, Dearborn, MI 48128, USA, No department found, Kernfysisch Versneller Instituut, Zernikelaan 25, 9747 AA, Groningen, The Netherlands, He) = 200 MeV was found to be in very good agreement with microscopic calculations., Department of Physics, Florida A & M University, Tallahassee, FL 32306, USA, Faculteit Natuurkunde en Sterrenkunde, Vrije Universiteit, de Boelelaan 1081, 1081 HV, Amsterdam, The Netherlands, Janecke, J., Becchetti, Fredrick D., Van den Berg, A.M., Berg, G.P.A., Brouwer, G., Greenfield, M.B., Harakeh, M.N., Hofstee, M.A., Nadasen, A., and Roberts, Donald A.
- Abstract
The (3He, t) charge-exchange reaction has been studied at [theta] = 0[deg] and bombarding energies of E(3He) = 76.5 MeV and 200 MeV. Spectra were measured using magnetic analysis for target nuclei of 12, 13C, 16O, 19F, 28, 29, 30Si, 90Zr, 117, 120Sn, natTa, natW, 197Au, 208Pb, 230, 232Th, 234, 236, 238U and 244Pu. The measurements at 76.5 MeV concentrated on the isobaric analog states of several actinide nuclei, particularly on their widths and the branching ratios for proton decay. Cross sections, Q-values and total widths were determined for the transitions to the isobaric analog states. Coulomb displacement energies derived from the measured Q-values display the influence of deformed nuclear shapes. Escape widths [Gamma][short up arrow] and spreading widths [Gamma][downwards arrow] of the isobaric analog states in five actinide nuclei were deduced from the measured proton-decay branching ratios. They were found to be in agreement with predictions which postulate isospin mixing via the Coulomb force with the (T0-1)-component of the isovector giant monopole resonance. The measurements at 200 MeV were concerned with transitions to isobaric analog states in both light and heavy nuclei, including several actinide nuclei, but Gamow-Teller resonances and transitions to numerous other states were also observed. The measured cross sections for several transitions to isobaric analog states from 30Si to 208Pb were used to extract the effective interaction V[tau] for non-spin-flip (3He, t) charge exchange at E(3He) [approximate] 200 MeV. The interaction strength V[tau] decreases by a factor 0.6 when compared to previously measured values for the energy range E(3He) = 65 to 90 MeV. An angular distribution from [theta][tau] = 0[deg] to 16[deg] for the transition to the isobaric analog state in 120Sb measured at E(3He) = 200 MeV was found to be in very good agreement with microscopic calculations.
- Published
- 2006
35. Reaction and proton-removal cross sections of Li-6, Be-7, B-10, C-9,C-10,C-11, N-12, O-13,O-15, and Ne-17 on Si at 15 to 53 MeV/nucleon
- Author
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Warner, R. E., Carstoiu, F., Brown, J. A., Becchetti, F. D., Roberts, D. A., Davids, B., Galonsky, A., Ronningen, R. M., Steiner, M., Horoi, M., Kolata, J. J., Nadasen, A., Samanta, C., Schwartzenberg, J., Subotić, Krunoslav M., Warner, R. E., Carstoiu, F., Brown, J. A., Becchetti, F. D., Roberts, D. A., Davids, B., Galonsky, A., Ronningen, R. M., Steiner, M., Horoi, M., Kolata, J. J., Nadasen, A., Samanta, C., Schwartzenberg, J., and Subotić, Krunoslav M.
- Abstract
Excitation functions for total reaction cross sections, sigma(R), were measured for the light, mainly proton-rich nuclei Li-6, Be-7, B-10, C-9,C-10,C-11, N-12, O-13,O-15, and Ne-17 incident on a Si telescope at energies between 15 and 53 MeV/nucleon. The telescope served as target, energy degrader and detector. Proton-removal cross sections, sigma(2p) for Ne-17 and sigma(p) for most of the other projectiles, were also measured. The strong absorption model reproduces the A-dependence of sigma(R), but not the detailed structure. Glauber multiple scattering theory and the Jeukenne, Lejeune, and Mahaux (JLM) folding model provided improved descriptions of the measured sigma(R) values. Rms radii, extracted from the measured sigma(R) using the optical limit of Glauber theory, are in good agreement with those obtained from high energy data. One-proton removal reactions are described using an extended Glauber model, incorporating second order noneikonal corrections, realistic single particle densities, and spectroscopic factors from shell model calculations.
- Published
- 2006
36. Momentum dependence of the nuclear mean field from peripheral heavy-ion collisions
- Author
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J. Lauret, R. Pak, W. J. Llope, N. T. B. Stone, Gary Westfall, A. Nadasen, S. Hannuschke, O. Bjarki, A. M. Vander Molen, and Roy A. Lacey
- Subjects
Physics ,Momentum ,Nuclear and High Energy Physics ,Transverse plane ,Mean field theory ,Plane (geometry) ,Heavy ion ,Impact parameter ,Atomic physics ,Nuclear matter ,Energy (signal processing) ,Nuclear Physics - Abstract
The energy at which the collective transverse flow in the reaction plane disappears, the balance energy ${\mathit{E}}_{\mathrm{bal}}$, is found to increase linearly as a function of impact parameter for $^{40}\mathrm{Ar}$${+}^{45}$Sc reactions. Comparison of our measured values of ${\mathit{E}}_{\mathrm{bal}}$(b) with predictions from quantum molecular dynamics (QMD) model calculations agrees better with an approach incorporating momentum dependence in the nuclear mean field. \textcopyright{} 1996 The American Physical Society.
- Published
- 1996
37. Isospin dependence of collective transverse flow in nuclear collisions
- Author
-
A. Nadasen, D. E. Russ, P. Pogodin, A. M. Vander Molen, Bao-An Li, Sherry Yennello, O. Bjarki, N. T. B. Stone, M. Steiner, R. Pak, J. A. Brown, Gary Westfall, E. Norbeck, L. B. Yang, Roy A. Lacey, W. Benenson, and S. Hannuschke
- Subjects
Physics ,Particle physics ,Physics::Medical Physics ,Nuclear Theory ,General Physics and Astronomy ,Function (mathematics) ,Nuclear matter ,Nuclear physics ,Transverse plane ,Flow (mathematics) ,Isospin ,Neutron ,Sensitivity (control systems) ,Nuclear Experiment ,Nucleon ,Nuclear Physics - Abstract
Collective transverse flow of nuclear matter was measured as a function of the ratio of neutrons to protons ( $N/Z$) of the interacting system for the first time. The collisions of three isotopically pure beams of $A\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}58\mathrm{nuclei}$ with two $A\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}58\mathrm{targets}$ were studied at 55 MeV/nucleon. The results for the flow variables demonstrate the sensitivity of transport models to elementary aspects of the nucleon-nucleon collisions.
- Published
- 1996
38. Patients with type 2 diabetes and difficulties associated with initiation of insulin therapy in a public health clinic in Durban
- Author
-
Nadasen, DM, primary and Naidoo, M, additional
- Published
- 2012
- Full Text
- View/download PDF
39. The sphericity of central heavy-ion reactions
- Author
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S. Hannuschke, Darren Craig, C. M. Mader, J. Lauret, A. Nadasen, G. Peilert, A. M. Vander Molen, R. Pak, Wolfgang Bauer, J. Yee, N. T. B. Stone, Sherry Yennello, G. D. Westfall, E. Norbeck, Roy A. Lacey, T. Li, W. J. Llope, and Eugene Gualtieri
- Subjects
Physics ,Nuclear and High Energy Physics ,Projection (relational algebra) ,Heavy ion ,Experimental methods ,Impact parameter ,Atomic physics ,Nucleon ,Hybrid model ,Beam (structure) ,Sphericity - Abstract
We have experimentally studied small impact parameter heavy-ion collisions in the (nearly) symmetry entrance channels $^{12}\mathrm{C}$${+}^{12}$C, $^{20}\mathrm{Ne}$${+}^{27}$Al, $^{40}\mathrm{Ar}$${+}^{45}$Sc, $^{84}\mathrm{Kr}$${+}^{93}$Nb, and $^{129}\mathrm{Xe}$${+}^{139}$La, each at many intermediate beam energies. The results from a number of analyses based on a projection of the ``shapes'' of the experimental events called the sphericity are presented. Comparisons of the relative efficiencies of various experimental methods for the selection of central events are made. The importance of autocorrelations between the sphericity and the various impact-parameter--dependent variables is evaluated. Searches for beam energy-dependent transitions from sequential binary disassembly to multifragmentation in the central events are described. Comparisons to dynamic and hybrid model code calculations will be discussed. The average sphericities of the intermediate mass fragments (IMF's, for which 3\ensuremath{\le}Z\ensuremath{\lesssim}20), are presented. The possibility that the IMF emission occurs following the formation of transient toroidal or disk-like geometries in the central events is explored. Increases in the average sphericities of the central events for increasing beam energies are observed which is attributed to transitions from sequential binary disassembly to multifragmentation. The transitional beam energies for the central $^{40}\mathrm{Ar}$${+}^{45}$Sc, $^{84}\mathrm{Kr}$${+}^{93}$Nb, and $^{129}\mathrm{Xe}$${+}^{139}$La reactions are near \ensuremath{\sim}50, \ensuremath{\sim}40, and \ensuremath{\sim}40 MeV/nucleon, respectively.
- Published
- 1995
40. Tracking fission-like processes in central collisions of $^{40}$Ar + $^{232}$Th: E = 15-115 A MeV
- Author
-
J. S. Winfield, Eugene Gualtieri, S. Hannuschke, Darren Craig, A. Nadasen, N. T. B. Stone, T. Li, A. M. Vander Molen, W. J. Llope, Roy A. Lacey, G. D. Westfall, J. Yee, R. Pak, E. Norbeck, and Sherry Yennello
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Range (particle radiation) ,Coincident ,Fission ,Nuclear Theory ,Atomic physics ,Nuclear Experiment ,Tracking (particle physics) ,Charged particle ,Beam (structure) ,Nuclear Physics - Abstract
Fission-like fragments and coincident charged particles have been measured in a 4π geometry over a wide energy range (15–115 A MeV) for the reaction 40 Ar+ 232 Th. The exclusive folding angle distribution data provide direct evidence that fission-like processes following incomplete-fusion are still an appreciable exit channel for beam energies as high as 115 A MeV.
- Published
- 1995
41. Absence of saturation in energy deposition in $^{40}$Ar + $^{232}$Th collisions at E = 15-115 A MeV
- Author
-
Gualtieri, E E, Yee, J, Craig, D, Hannuschke, S A, Lacey, R A, Li, T, Llope, W J, Nadasen, A, Norbeck, E, Pak, R, Stone, N T B, Van der Molen, A, Winfield, J S, Westfall, G D, and Yennello, S J
- Subjects
Nuclear Physics - Published
- 1995
42. Autocorrelations and intermediate mass fragment multiplicities in central heavy-ion collisions
- Author
-
Llope, W J, Conrad, J A, Mader, C M, Peilert, G, Bauer, W, Craig, D, Gualtieri, E E, Hannuschke, S A, Lacey, R A, Lauret, J, Li, T, Nadasen, A, Norbeck, E, Pak, R, Stone, N T B, Van der Molen, A, Westfall, G D, Yee, J, and Yennello, S J
- Subjects
Nuclear Physics - Published
- 1994
43. Total reaction and neutron-removal cross sections of (30-60)A MeV Be isotopes on Si and Pb
- Author
-
Warner, RE, McKinnon, MH, Needleman, JS, Shaner, NC, Becchetti, ED, Roberts, DA, Galonsky, A, Ronningen, RM, Steiner, M, Brown, JA, Kolata, JJ, Nadasen, A, Subotić, Krunoslav M., Warner, RE, McKinnon, MH, Needleman, JS, Shaner, NC, Becchetti, ED, Roberts, DA, Galonsky, A, Ronningen, RM, Steiner, M, Brown, JA, Kolata, JJ, Nadasen, A, and Subotić, Krunoslav M.
- Abstract
Total reaction cross sections sigma (R) of all particle-stable Be isotopes on Si, and several of their neutron-removal cross sections sigma (-xn), were measured near (30-60)A MeV by injecting magnetically separated, focused, monoenergetic secondary beams of these projectiles into a telescope containing nine Si transmission detectors. Similar measurements were made for Be10-12 on Pb, by placing Pb targets between the Si detectors of another telescope. A Glauber analysis of the Be+Si sigma (R) data, including only nuclear forces, yields rms radii for the Be isotopes in general agreement with those found by other workers. Similar calculations underpredict the CTR data for Be+Pb, showing the importance of electromagnetic dissociation. A simple microscopic theory reproduces the n-removal cross sections for Be-11 and Be-14 on Si, but overpredicts n removal for Be-11 on Ph. For Be-12 incident upon both Si and Pb targets, sigma (-2n) significantly exceeds sigma (-n), as is expected since 1n removal leaves the weakly bound halo nucleus Be-11. A similar effect for Be-10 on Si is attributed to the weak binding of the last neutron of Be-9; however, for Be-10+Pb, sigma (-n) slightly exceeds sigma (-2n).
- Published
- 2001
44. Total reaction and neutron-removal cross sections of (30-60)A MeV Be isotopes on Si and Pb
- Author
-
Warner, Robert E., McKinnon, MH, Needleman, JS, Shaner, NC, Becchetti, ED, Roberts, DA, Galonsky, A, Ronningen, RM, Steiner, M, Brown, James, Kolata, JJ, Nadasen, A, Subotić, Krunoslav M., Warner, Robert E., McKinnon, MH, Needleman, JS, Shaner, NC, Becchetti, ED, Roberts, DA, Galonsky, A, Ronningen, RM, Steiner, M, Brown, James, Kolata, JJ, Nadasen, A, and Subotić, Krunoslav M.
- Abstract
Total reaction cross sections sigma (R) of all particle-stable Be isotopes on Si, and several of their neutron-removal cross sections sigma (-xn), were measured near (30-60)A MeV by injecting magnetically separated, focused, monoenergetic secondary beams of these projectiles into a telescope containing nine Si transmission detectors. Similar measurements were made for Be10-12 on Pb, by placing Pb targets between the Si detectors of another telescope. A Glauber analysis of the Be+Si sigma (R) data, including only nuclear forces, yields rms radii for the Be isotopes in general agreement with those found by other workers. Similar calculations underpredict the CTR data for Be+Pb, showing the importance of electromagnetic dissociation. A simple microscopic theory reproduces the n-removal cross sections for Be-11 and Be-14 on Si, but overpredicts n removal for Be-11 on Ph. For Be-12 incident upon both Si and Pb targets, sigma (-2n) significantly exceeds sigma (-n), as is expected since 1n removal leaves the weakly bound halo nucleus Be-11. A similar effect for Be-10 on Si is attributed to the weak binding of the last neutron of Be-9; however, for Be-10+Pb, sigma (-n) slightly exceeds sigma (-2n).
- Published
- 2001
45. Total reaction and neutron-removal cross sections of (30-60)A MeV He and Li isotopes on Pb
- Author
-
Warner, RE, McKinnon, MH, Shaner, NC, Becchetti, FD, Nadasen, A, Roberts, DA, Brown, JA, Galonsky, A, Kolata, JJ, Ronningen, RM, Steiner, M, Subotić, Krunoslav M., Warner, RE, McKinnon, MH, Shaner, NC, Becchetti, FD, Nadasen, A, Roberts, DA, Brown, JA, Galonsky, A, Kolata, JJ, Ronningen, RM, Steiner, M, and Subotić, Krunoslav M.
- Abstract
Total reaction cross sections sigma(R) of (30-60)A MeV He-4,He-6,He-8 and Li-6,Li-7,Li-8,Li-9,Li-11 on Ph, and 2n-removal cross sections sigma-(2n) of He-6,He-8 and Li-11 on Pb, were measured by injecting magnetically separated, focused, monoenergetic, secondary beams of those projectiles into a telescope containing Pb targets separated by thin Si detectors. All these sigma(R)s (except He-4), and sigma-(2n) for He-6 and Li-11, are underpredicted by microscopic model calculations which include only nuclear forces. Better agreement is achieved by including electromagnetic dissociation in the model, for those projectiles for which either the electric dipole response functions or the dominant photodissociation cross sections were known. The cross sections sigma-(4n) for He-8, sigma-(xn) for Li-7,Li-8,Li-9, and (sigma-(3n)+ sigma-(4n)) for Li-11 were found to be less than or equal to 0.7 b. All sigma(R)s were measured to better than 5% accuracy, showing that the method is usable for other target elements sandwiched into a Si telescope.
- Published
- 2000
46. Total reaction and neutron-removal cross sections of (30-60)A MeV He and Li isotopes on Pb
- Author
-
Warner, Robert E., McKinnon, MH, Shaner, NC, Becchetti, FD, Nadasen, A, Roberts, DA, Brown, James, Galonsky, A, Kolata, JJ, Ronningen, RM, Steiner, M, Subotić, Krunoslav M., Warner, Robert E., McKinnon, MH, Shaner, NC, Becchetti, FD, Nadasen, A, Roberts, DA, Brown, James, Galonsky, A, Kolata, JJ, Ronningen, RM, Steiner, M, and Subotić, Krunoslav M.
- Abstract
Total reaction cross sections sigma(R) of (30-60)A MeV He-4,He-6,He-8 and Li-6,Li-7,Li-8,Li-9,Li-11 on Ph, and 2n-removal cross sections sigma-(2n) of He-6,He-8 and Li-11 on Pb, were measured by injecting magnetically separated, focused, monoenergetic, secondary beams of those projectiles into a telescope containing Pb targets separated by thin Si detectors. All these sigma(R)s (except He-4), and sigma-(2n) for He-6 and Li-11, are underpredicted by microscopic model calculations which include only nuclear forces. Better agreement is achieved by including electromagnetic dissociation in the model, for those projectiles for which either the electric dipole response functions or the dominant photodissociation cross sections were known. The cross sections sigma-(4n) for He-8, sigma-(xn) for Li-7,Li-8,Li-9, and (sigma-(3n)+ sigma-(4n)) for Li-11 were found to be less than or equal to 0.7 b. All sigma(R)s were measured to better than 5% accuracy, showing that the method is usable for other target elements sandwiched into a Si telescope.
- Published
- 2000
47. Journal of American History
- Author
-
Theoharis, Jeanne, primary and Nadasen, Premilla, additional
- Published
- 2005
- Full Text
- View/download PDF
48. Awareness of diabetes mellitus among African traditional healers in the Nelson Mandela Metropole
- Author
-
Van Huyssteen, Mea, primary, Reddy, Millidhashni, additional, Naidoo, Nadasen T, additional, Boschmans, Shirley-Anne, additional, McCartney, Jane, additional, and Van de Venter, Maryna, additional
- Published
- 2004
- Full Text
- View/download PDF
49. Reaction cross sections in Si of light proton-halo candidates N-12 and Ne-17
- Author
-
Warner, RE, Thirumurthy, H, Woodroffe, J, Becchetti, FD, Brown, JA, Davids, BS, Galonsky, A, Kolata, JJ, Kruse, JJ, Lee, MY, Nadasen, A, O'Donnell, TW, Roberts, DA, Ronningen, RM, Samanta, C, Schwandt, P, von Schwarzenberg, J, Steiner, M, Subotić, Krunoslav M., Wang, Jiansong, Zimmerman, JA, Warner, RE, Thirumurthy, H, Woodroffe, J, Becchetti, FD, Brown, JA, Davids, BS, Galonsky, A, Kolata, JJ, Kruse, JJ, Lee, MY, Nadasen, A, O'Donnell, TW, Roberts, DA, Ronningen, RM, Samanta, C, Schwandt, P, von Schwarzenberg, J, Steiner, M, Subotić, Krunoslav M., Wang, Jiansong, and Zimmerman, JA
- Abstract
Total reaction cross sections, sigma(R), on Si were measured near 40 A MeV for the proton-halo candidate N-12 and the two-proton-halo candidate Ne-17, and were compared with sigma(R) for other light proton-rich nuclei. The A-dependence shows enhanced sigma(R)s for N-12 and Ne-17, relative to their neighbors, but the effect is smaller than for B-8 which has been argued to have a proton halo. In general, nuclei with loosely bound last protons (S-p less than or equal to 1.5 MeV) have significantly larger sigma(R)S than their neighbors. Cross sections for charge-removal from N-12 and Ne-17 also were obtained. (C) 1998 Elsevier Science B.V.
- Published
- 1998
50. Reaction cross sections in Si of light proton-halo candidates N-12 and Ne-17
- Author
-
Warner, Robert E., Thirumurthy, H., Woodroffe, J., Becchetti, FD, Brown, James, Davids, BS, Galonsky, A, Kolata, JJ, Kruse, JJ, Lee, MY, Nadasen, A, O'Donnell, TW, Roberts, DA, Ronningen, RM, Samanta, C, Schwandt, P, von Schwarzenberg, J, Steiner, M, Subotić, Krunoslav M., Wang, Jiansong, Zimmerman, JA, Warner, Robert E., Thirumurthy, H., Woodroffe, J., Becchetti, FD, Brown, James, Davids, BS, Galonsky, A, Kolata, JJ, Kruse, JJ, Lee, MY, Nadasen, A, O'Donnell, TW, Roberts, DA, Ronningen, RM, Samanta, C, Schwandt, P, von Schwarzenberg, J, Steiner, M, Subotić, Krunoslav M., Wang, Jiansong, and Zimmerman, JA
- Abstract
Total reaction cross sections, sigma(R), on Si were measured near 40 A MeV for the proton-halo candidate N-12 and the two-proton-halo candidate Ne-17, and were compared with sigma(R) for other light proton-rich nuclei. The A-dependence shows enhanced sigma(R)s for N-12 and Ne-17, relative to their neighbors, but the effect is smaller than for B-8 which has been argued to have a proton halo. In general, nuclei with loosely bound last protons (S-p less than or equal to 1.5 MeV) have significantly larger sigma(R)S than their neighbors. Cross sections for charge-removal from N-12 and Ne-17 also were obtained. (C) 1998 Elsevier Science B.V.
- Published
- 1998
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