31 results on '"Roca, V"'
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2. Measurement of 1323 and 1487 keV resonances in N 15 (α,γ) F 19 with the recoil separator ERNA
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Di Leva, A., Imbriani, G., Buompane, R., Gialanella, L., Best, A., Cristallo, S., De Cesare, M., D'Onofrio, A., Duarte, J. G., Gasques, L. R., Morales-Gallegos, L., Pezzella, A., Porzio, G., Rapagnani, D., Roca, V., Romoli, M., Schürmann, D., Straniero, O., Terrasi, F., Di Leva, A., Imbriani, G., Buompane, R., Gialanella, L., Best, A., Cristallo, S., De Cesare, M., D'Onofrio, A., Duarte, J. G., Gasques, L. R., Morales-Gallegos, L., Pezzella, A., Porzio, G., Rapagnani, D., Roca, V., Romoli, M., Schã¼rmann, D., Straniero, O., and Terrasi, F.
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Nuclear and High Energy Physics - Abstract
Background: The origin of fluorine is a widely debated issue. Nevertheless, the N15(α,γ)F19 reaction is a common feature among the various production channels so far proposed. Its reaction rate at relevant temperatures is determined by a number of narrow resonances together with the direct capture and the tails of the two broad resonances at Ec.m.=1323 and 1487 keV. Purpose: The broad resonances widths, Îγ and Îα, have to be measured with adequate precision in order to better determine their contribution to the N15(α,γ)F19 stellar reaction rate. Methods: Measurement through the direct detection of the F19 recoil ions with the European Recoil separator for Nuclear Astrophysics (ERNA) were performed. The reaction was initiated by a N15 beam impinging onto a He4 windowless gas target. The observed yield of the resonances at Ec.m.=1323 and 1487 keV is used to determine their widths in the α and γ channels. Results: We show that a direct measurement of the cross section of the N15(α,γ)F19 reaction can be successfully obtained with the recoil separator ERNA, and the widths Îγ and Îα of the two broad resonances have been determined. While a fair agreement is found with earlier determination of the widths of the 1487 keV resonance, a significant difference is found for the 1323 keV resonance Îα. Conclusions: The revision of the widths of the two more relevant broad resonances in the N15(α,γ)F19 reaction presented in this work is the first step toward a more firm determination of the reaction rate. At present, the residual uncertainty at the temperatures of the F19 stellar nucleosynthesis is dominated by the uncertainties affecting the direct capture component and the 364 keV narrow resonance, both so far investigated only through indirect experiments.
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- 2017
3. Actinides AMS at CIRCE and 236U and Pu measurements of structural and environmental samples from in and around a mothballed nuclear power plant
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De Cesare, M, L K, Fifield, Sabbarese, C, S G, Tims, De Cesare, N, D'Arco, A, D’Onofrio, A, A M, Esposito, Gialanella, L, Mancini, F, Petraglia, A, Roca, V, Terrasi, F, M., De Cesare, L. K., Fifield, C., Sabbarese, S. G., Tim, N., De Cesare, A., D’Onofrio, A., D’Arco, A. M., Esposito, A., Petraglia, Roca, Vincenzo, F., Terrasi, De Cesare, M., Fifield, L. K., Sabbarese, Carlo, Tims, S. G., DE CESARE, Nicola, D'Onofrio, Antonio, D'Arco, A., Esposito, A. M., Petraglia, A., Roca, V., and Terrasi, Filippo
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236U ,Environmental and structural samples ,Nuclear and High Energy Physics ,Pu isotopes ,Nuclear engineering ,Radiochemistry ,chemistry.chemical_element ,Mass and isotopic ratio sensitivitie ,Actinide ,Contamination ,Uranium ,Mass spectrometry ,Nuclear decommissioning ,law.invention ,Background level ,chemistry ,law ,Nuclear power plant ,Mass and isotopic ratio sensitivities ,Pu isotope ,Instrumentation ,Accelerator mass spectrometry - Abstract
Accelerator mass spectrometry (AMS) is presently the most sensitive technique for the measurement of long-lived actinides, e.g. 236U and 239Pu. A new actinide line is in operation at the Center for Isotopic Research on Cultural and Environmental heritage (CIRCE) in Caserta, Italy. Using the actinide line a uranium mass sensitivity of around 4 μg has been reached measuring with a 16-strip silicon detector, and a 239Pu background level of below 0.1 fg has been obtained. In this work we also discuss preliminary results for environmental and structural samples from in and around the Garigliano nuclear power plant (GNPP), presently in the decommissioning phase. Measurements on environmental samples from the vicinity of the plant allow the assessment of contamination, if any, over the years. Measurements of structural samples from the plant are relevant to the optimization of the decommissioning program for the GNPP.
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- 2013
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4. First measurement of the 14N(p,γ)15O cross section down to 70 keV
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Lemut, A., Bemmerer, D., Confortola, F., Bonetti, R., Broggini, C., Corvisiero, P., Costantini, H., Cruz, J., Formicola, A., Fülöp, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, Gy., Imbriani, G., Jesus, A.P., Junker, M., Limata, B., Menegazzo, R., Prati, P., Roca, V., Rogalla, D., Rolfs, C., Romano, M., Rossi Alvarez, C., Schümann, F., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., and Trautvetter, H.P.
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Nuclear and High Energy Physics - Published
- 2006
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5. Off-line production of a 7Be radioactive ion beam
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Gialanella L, Greife U, De Cesare N, D'ONOFRIO, Antonio, Romano M, Campajola L, Formicola A, Fulop Z, Gyurky G, Imbriani G, LUBRITTO, Carmine, Ordine A, Roca V, Rogalla D, Rolfs C, Russo M, Somorjai E, Strieder F, TERRASI, Filippo, Trautvetter HP, RI Gyurky Gyorgy/F 1078 2010 Fulop Zsolt/B 2262 2008, SABBARESE, Carlo, L., Gialanella, U., Greife, N., De Cesare, A., D’Onofrio, Romano, Mario, L., Campajola, A., Formicola, Z., Fulop, G., Gyurky, Imbriani, Gianluca, C., Lubritto, A., Ordine, Roca, Vincenzo, D., Rogalla, C., Rolf, Russo, Michele, C., Sabbarese, E., Somorjai, F., Strieder, F., Terrasi, H. P., Trautvetter, Gialanella, L, Greife, U, De Cesare, N, D'Onofrio, Antonio, Romano, M, Campajola, L, Formicola, A, Fulop, Z, Gyurky, G, Imbriani, G, Lubritto, Carmine, Ordine, A, Roca, V, Rogalla, D, Rolfs, C, Russo, M, Sabbarese, Carlo, Somorjai, E, Strieder, F, Terrasi, Filippo, Trautvetter, Hp, and RI Gyurky Gyorgy/F 1078 2010 Fulop Zsolt/B 2262, 2008
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Nuclear and High Energy Physics ,Ion beam ,Proton ,Chemistry ,Cyclotron ,Radiochemistry ,Nuclear reaction ,Ion ,law.invention ,Ion beam analysis and implantation ,Ion beam deposition ,Sputtering ,law ,Radioactive beam production ,Nuclide ,Instrumentation ,Beam (structure) - Abstract
A 7Be ion beam of several particle pA at 8 MeV has been produced at the TTT3 tandem of the University "Federico II" in Naples. The 7Be nuclides were formed via the 7Li(p,n)7Be reaction using a metallic Li target and an 11.4 MeV proton beam of 20 μA intensity, delivered by the cyclotron in Debrecen. Methods of hot chemistry were used to extract the 7Be nuclides from the Li matrix and to prepare the 7Be cathodes for the ion sputter source of the tandem. Examples of 7Be beam applications are given. © 2002 Elsevier Science B.V. All rights reserved.
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- 2002
6. The N14(p, gamma)O15 reaction studied with a composite germanium detector
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Marta, M., Formicola, A., Bemmerer, D., Broggini, C., Caciolli, A., Corvisiero, P., Costantini, H., Elekes, Z., Fülöp, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, Gy., Imbriani, G., Junker, M., Lemut, A., Limata, B., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., Trautvetter, H. P., and Vomiero, A.
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Nuclear and High Energy Physics - Published
- 2011
7. Erratum: Constraining the S factor of N15(p,γ)O16 at astrophysical energies (Physical Review C - Nuclear Physics (2010) 82 (055804) DOI: 10.1103/PhysRevC.82.055804)
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Leblanc, P. J., Imbriani, G., Görres, J., Junker, M., Azuma, R., Beard, M., Bemmerer, D., Best, A., Broggini, C., Caciolli, A., Corvisiero, P., Costantini, H., Couder, M., Deboer, R., Elekes, Z., Falahat, S., Formicola, A., Fülöp, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, Gy., Käppeler, F., Kontos, A., Kuntz, R., Leiste, H., Lemut, A., Li, Q., Limata, B., Marta, M., Mazzocchi, C., Menegazzo, R., O'Brien, S., Palumbo, A., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Stech, E., Straniero, O., Strieder, F., Tan, W., Terrasi, F., Trautvetter, H. P., Uberseder, E., and Wiescher, M.
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Nuclear and High Energy Physics - Published
- 2011
8. An actively vetoed Clover γ-detector for nuclear astrophysicsat LUNA
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Luna, Collaboration, Szucs, T., Bemmerer, D., Broggini, C., Caciolli, A., Confortola, F., Corvisiero, P., Elekes, Z., Formicola, A., Fulop, Zs, Gervino, G., Guglielmetti, A., Gustavino, C., Gyurky, Gy, Imbriani, G., Junker, M., Lemut, A., Marta, M., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Oscar Straniero, Strieder, F., Terrasi, F., Trautvetter, H. P., T., Szuc, D., Bemmerer, C., Broggini, A., Caciolli, F., Confortola, P., Corvisiero, Z., Eleke, A., Formicola, F¨ul¨op, Z. s., G., Gervino, A., Guglielmetti, C., Gustavino, Gy¨urky, G. y., Imbriani, Gianluca, M., Junker, A., Lemut, M., Marta, C., Mazzocchi, R., Menegazzo, P., Prati, Roca, Vincenzo, C., Rolf, C., Rossi Alvarez, E., Somorjai, O., Straniero, F., Strieder, F., Terrasi, and H. P., Trautvetter
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Physics ,Nuclear and High Energy Physics ,Clover type HP Germaniun detector ,Physics::Instrumentation and Detectors ,Detector ,Astrophysics::Instrumentation and Methods for Astrophysics ,FOS: Physical sciences ,Underground Laboratories ,Semiconductor detector ,Nuclear physics ,Nuclear astrophysics ,High Energy Physics::Experiment ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment ,Nuclear Astrophysic - Abstract
An escape-suppressed, composite high-purity germanium detector of the Clover type has been installed at the Laboratory for Underground Nuclear Astrophysics (LUNA) facility, deep underground in the Gran Sasso Laboratory, Italy. The laboratory gamma-ray background of the Clover detector has been studied underground at LUNA and, for comparison, also in an overground laboratory. Spectra have been recorded both for the single segments and for the virtual detector formed by online addition of all four segments. The effect of the escape-suppression shield has been studied as well. Despite their generally higher intrinsic background, escape-suppressed detectors are found to be well suited for underground nuclear astrophysics studies. As an example for the advantage of using a composite detector deep underground, the weak ground state branching of the Ep = 223 keV resonance in the 24Mg(p,gamma)25Al reaction is determined with improved precision., 8 pages, 6 figures, 3 tables; as accepted by Eur. Phys. J. A
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- 2010
9. Constraining the S factor of N15(p,γ)O16 at astrophysical energies
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Leblanc, P. J., Imbriani, G., Görres, J., Junker, M., Azuma, R., Beard, M., Bemmerer, D., Best, A., Broggini, Carlo, Caciolli, A., Corvisiero, P., Costantini, H., Couder, M., Deboer, R., Elekes, Z., Falahat, S., Formicola, A., Fülöp, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Gyürky, Gy., Käppeler, F., Kontos, A., Kuntz, R., Leiste, H., Lemut, A., Li, Q., Limata, B., Marta, M., Mazzocchi, C., Menegazzo, R., O'Brien, S., Palumbo, A., Prati, P., Roca, V., Rolfs, C., Rossi Alvarez, C., Somorjai, E., Stech, E., Straniero, O., Strieder, F., Tan, W., Terrasi, F., Trautvetter, H. P., Uberseder, E., and Wiescher, M.
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Nuclear and High Energy Physics - Published
- 2010
10. New experimental study of low-energy (p,gamma) resonances in magnesium isotopes
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Limata, B., Strieder, F., Formicola, A., Imbriani, G., Junker, M., Becker, H. W., Bemmerer, D., Best, A., Bonetti, R., Broggini, C., Caciolli, A., Corvisiero, P., Costantini, H., DiLeva, A., Elekes, Z., F��l��p, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Gy��rky, Gy., Lemut, A., Marta, M., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Alvarez, C. Rossi, Salvo, C., Somorjai, E., Straniero, O., Terrasi, F., and Trautvetter, H. -P.
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Nuclear and High Energy Physics ,FOS: Physical sciences ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment - Abstract
Proton captures on Mg isotopes play an important role in the Mg-Al cycle active in stellar H shell burning. In particular, the strengths of low-energy resonances with E < 200 keV in 25Mg(p,gamma)26Al determine the production of 26Al and a precise knowledge of these nuclear data is highly desirable. Absolute measurements at such low-energies are often very difficult and hampered by gamma-ray background as well as changing target stoichiometry during the measurements. The latter problem can be partly avoided using higher energy resonances of the same reaction as a normalization reference. Hence the parameters of suitable resonances have to be studied with adequate precision. In the present work we report on new measurements of the resonance strengths omega_gamma of the E = 214, 304, and 326 keV resonances in the reactions 24Mg(p,gamma)25Al, 25Mg(p,gamma)26Al, and 26Mg(p,gamma)27Al, respectively. These studies were performed at the LUNA facility in the Gran Sasso underground laboratory using multiple experimental techniques and provided results with a higher accuracy than previously achieved., 16 pages, 7 figures, accepted for publication in Phys. Rev. C
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- 2010
11. Precision study of ground state capture in the 14N(p,γ)15O reaction
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Marta, M., Formicola, A., Gyürky, Gy., Bemmerer, D., Broggini, C., Caciolli, A., Corvisiero, P., Costantini, H., Elekes, Z., Fülöp, Zs., Gervino, G., Guglielmetti, A., Gustavino, C., Imbriani, G., Junker, M., Kunz, R., Lemut, A., Limata, B., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Romano, M., Alvarez, C. Rossi, Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., Trautvetter, H. P., and Vomiero, A.
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Nuclear and High Energy Physics - Published
- 2008
12. Precision study of ground state capture in the 14N(p,γ)15O reaction
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Marta, M., Formicola, A., Gyurky, G., Bemmerer, D., Broggini, C., Caciolli, A., Corvisiero, P., Costantini, H., Elekes, Z., Fulop, Z., Gervino, Gianpiero, Guglielmetti, A., Gustavino, C., Imbriani, G., Junker, M., Kunz, R., Lemut, A., Limata, B., Mazzocchi, C., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Romano, M., Alvarez, C. R., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., Trautvetter, H. P., and Vomiero, A.
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S-FACTOR ,Physics and Astronomy (all) ,Nuclear and High Energy Physics ,N-14(P ,SOLAR NEUTRINOS ,ACCELERATOR ,SIMULATION ,MODELS ,GAMMA)O-15 ,O-15 - Published
- 2008
13. Erratum: Astrophysical S factor of the He3(α,γ)Be7 reaction measured at low energy via detection of prompt and delayed γ rays (Physical Review C (2007) 75 (065803))
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Confortola, F., Bemmerer, D., Costantini, H., Formicola, A., Gyürky, G. y., Bezzon, P., Bonetti, R., Broggini, C., Corvisiero, P., Elekes, Z., Fülöp, Z. s., Gervino, Gianpiero, Guglielmetti, A., Gustavino, C., Imbriani, G., Junker, M., Laubenstein, M., Lemut, A., Limata, B., Lozza, V., Marta, M., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Alvarez, C. Rossi, Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., and Trautvetter, H. P.
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Physics and Astronomy (all) ,Nuclear and High Energy Physics - Published
- 2007
14. Low energy measurement of the 14N(p,γ)15O total cross section at the LUNA underground facility
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Bemmerer, D., Confortola, F., Lemut, A., Bonetti, R., Broggini, C., Corvisiero, P., Costantini, H., Cruz, J., Formicola, A., Fülöp, Z. s., Gervino, Gianpiero, Guglielmetti, A., Gustavino, C., Gyürky, G. y., Imbriani, G., Jesus, A., Junker, M., Limata, B., Menegazzo, R., Prati, P, Roca, V., Rolfs, C., Rogalla, D., Romano, M., Rossi Alvarez, C., Schümann, F., Somorjai, E., Straniero, O., Strieder, F., Terrasi, F., Trautvetter, H. P., D., Bemmerer, F., Confortola, A., Lemut, R., Bonetti, C., Broggini, P., Corvisiero, H., Costantini, J., Cruz, A., Formicola, Fülöp, Z. s., G., Gervino, A., Guglielmetti, C., Gustavino, Gyürky, G. y., Imbriani, Gianluca, A., Jesu, M., Junker, B., Limata, R., Menegazzo, P., Prati, Roca, Vincenzo, C., Rolf, D., Rogalla, Romano, Mario, C., Rossi Alvarez, F., Schümann, E., Somorjai, O., Straniero, F., Strieder, F., Terrasi, and H. P., Trautvetter
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Physics ,Experimental Nuclear Physic ,Nuclear and High Energy Physics ,CNO cycle ,S-factor ,Underground accelerator ,14N(p, γ)15O ,Direct measurement ,underground laboratory ,γ)15O ,Nuclear physics ,Cross section (physics) ,Low energy ,14N(p ,National laboratory ,Nuclear Astrophysic - Abstract
Deep underground in Gran Sasso National Laboratory (Italy), at the LUNA facility, the cross section of the 14N(p, γ)15O, the slowest process of the CNO cycle, has been measured at energies much lower than achieved before. Using a 400 kV accelerator, a windowless gas target and a 4π BGO summing detector, direct cross section data has been obtained down to 70 keV, reaching a value of 0.24 picobarn, corresponding to an S-factor of 1.74±0.14(stat)±0.14(syst) keV barn. The Gamow peak has been covered by direct experimental data for several scenarios of stable and explosive hydrogen burning. The ωγ strength of the 259 keV resonance has been re-measured obtaining 12.8±0.3(stat)±0.4(syst) meV. The stellar reaction rate has been calculated for temperatures 0.09×109−0.3×109 K. A complete description of the experiment is here presented, including the impact of the present data on nucleosynthesis in AGB stars.
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- 2006
15. Dissemination about natural radioactivity through work-based learning experiences
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Giuseppe La Verde, Vincenzo Roca, Mariagabriella Pugliese, Pugliese, M., La Verde, G., and Roca, V.
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Physics ,Nuclear and High Energy Physics ,Particle physics ,Work-based learning ,010308 nuclear & particles physics ,Astroparticles' School ,Radon gas ,01 natural sciences ,Risk perception ,Basic knowledge ,Work (electrical) ,Radon ,General partnership ,0103 physical sciences ,RadioLab ,Mathematics education ,Natural (music) ,010306 general physics ,Natural radioactivity - Abstract
This work investigates the importance of Work-Based Learning experiences of Italian high school students and how some extracurricular basic knowledge may influence the student's intrinsic motivation. The Italian model, named Alternation School-Work (ASW), highlights the partnership between schools and workplaces or real life situations. So that, we consider the experience of about 120 students of three different schools located in Campania Region (South Italy). Our goal has been to educate students on topics such as environmental radioactivity and in particular about the public exposure to radioactivity of natural origin (cosmic rays, radon…), in the framework of Astroparticles' School of National Institute of Nuclear Physics, also introducing they in real measurement campaigns. Having improved knowledge about their country's geophysical features, the students have drawn up informative material and a simple survey to propose to the local population in order to understand the level of knowledge on the issue of radioactivity and the consequent perception of risk. The result has been that the students could know and deal with the problem, in a realistic way, from the point of view of scientific research, thanks also to the RadioLab project of National Institute of Nuclear Physics (INFN), through which measurements of the concentration of radon gas activity have been carried out in the buildings of their own school complexes.
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- 2019
16. A new AMS facility in Caserta/Italy
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Vincenzo Roca, Isabella Passariello, Gianluca Imbriani, Filippo Terrasi, Mario R. Romano, Mauro Rubino, G. Casa, Carlo Sabbarese, Fabio Marzaioli, Lucio Gialanella, N. De Cesare, Roger Loger, M.L. Sundquist, Antonio D'Onofrio, Carmine Lubritto, A. Palmieri, Detlef Rogalla, F., Terrasi, D., Rogalla, N., De Cesare, A., Donofrio, C., Lubritto, F., Marzaioli, I., Passariello, M., Rubino, C., Sabbarese, G., Casa, A., Palmieri, L., Gialanella, Imbriani, Gianluca, Roca, Vincenzo, M., Romano, M., Sundquist, R., Roger, Terrasi, Filippo, Rogalla, D., De Cesare, N., D'Onofrio, Antonio, Lubritto, Carmine, Marzaioli, Fabio, Passariello, I., Rubino, M., Sabbarese, Carlo, Casa, G., Palmieri, A., Gialanella, Lucio, Imbriani, G., Roca, V., Romano, M., Sundquist, M., and Roger, R.
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Nuclear and High Energy Physics ,chemistry.chemical_element ,Accelerator mass spectrometry ,Uranium ,Archaeology ,Radiocarbon ,Experimental Nuclear Physics ,law.invention ,chemistry ,Accelerator Mass Spectroscopy ,law ,Environmental science ,Radiocarbon dating ,Instrumentation - Abstract
A new AMS system has been installed at Center for Isotopic Research on Cultural and Environmental Heritage (CIRCE) in Caserta/ Italy. It was built by National Electrostatics Corp. Middleton, WI/USA, and arrived at CIRCE in the middle of January 2005; the installation and the acceptance tests were completed at the end of February 2005. At first, the system is intended for Radiocarbon AMS; for future Al and Be AMS only minor upgrades are needed and the magnets are designed to bend heavy isotopes like Uranium. Concerning Radiocarbon AMS, the first measurements of unknown samples, prepared in the internal preparation laboratory, already yielded results of high precision and C-14 dating is in full swing. (c) 2007 Elsevier B.V. All rights reserved.
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- 2007
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17. New measurement of 7Be half-life in different metallic environments
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Lucio Gialanella, F. Raiola, Gianluca Imbriani, Filippo Terrasi, Frank Strieder, B. Limata, Zs. Fülöp, Detlef Rogalla, E. Somorjai, Mario R. Romano, Antonio Esposito, Antonio D'Onofrio, Vincenzo Roca, D. Schürmann, N. De Cesare, C. Rolfs, Gy. Gyürky, B. N., Limata, Z., Fulop, D., Shuerman, N., De Cesare, D'Onofrio, A. n. t., A., Esposito, L., Gialanella, G., Gyurky, Imbriani, Gianluca, F., Raiola, Roca, Vincenzo, D., Rogalla, C., Rolf, M., Romano, M., Somorjai, F., Strider, F., Terrasi, Limatala, Bn, Fulop, Z, Schurmann, D, De Cesare, N, D'Onofrio, Antonio, Esposito, A, Gialanella, Lucio, Gyurky, G, Imbriani, G, Raiola, F, Roca, V, Rogalla, D, Rolfs, C, Romano, M, Somorjai, E, Strieder, F, and Terrasi, Filippo
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Physics ,Nuclear and High Energy Physics ,Electron density ,Zirconium ,Ion beam ,Electron capture ,Gamma ray ,Tantalum ,chemistry.chemical_element ,Electron ,Tungsten ,Nuclear physics ,Radioactivity ,chemistry ,half life ,Atomic physics - Abstract
(7)Be decays via electron capture and therefore its half-life is expected to depend on the electron density at the nucleus. We measured the (7)Be half-life in palladium, tungsten, zirconium and tantalum metals, in order to investigate the influence of the quasi-free electrons in metals on the probability of electron capture. The (7)Be samples were obtained implanting a 4.85 MeV pure radioactive (7)Be ion beam. The (7)Be half-life was determined measuring the 478 keV gamma decay following the electron capture by means of HPGe detectors. In order to reduce systematic errors, we planned to perform independent measurements in three different laboratories: Naples (Italy), Bochum (Germany) and Debrecen (Hungary). On the basis of the first results, we do not find a (7)Be half-life change within the experimental errors of 0.4%. RI Fulop, Zsolt/B-2262-2008
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- 2006
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18. Enhanced d(d,p)t fusion reaction in metals
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Hans Werner Becker, H. Luis, Carlo Broggini, F. Raiola, M. Junker, Antonio D'Onofrio, Mario R. Romano, Gianluca Imbriani, Marialuisa Aliotta, B. Limata, Filippo Terrasi, João Cruz, S. Zeng, Lucio Gialanella, Vincenzo Roca, M. Fonseca, Frank Strieder, Zs. Fülöp, J.P. Ribeiro, A. P. Jesus, C. Rolfs, Gy. Gyürky, B. Burchard, A. Di Leva, E. Somorjai, F., Raiola, B., Burchard, Fülöp, Z. s., Gyürky, G. y., S., Zeng, J., Cruz, DI LEVA, Antonino, Limata, BENEDICTA NORMANNA, M., Fonseca, H., Lui, M., Aliotta, H. W., Becker, C., Broggini, A., D'Onofrio, L., Gialanella, Imbriani, Gianluca, A. P., Jesu, M., Junker, J. P., Ribeiro, Roca, Vincenzo, C., Rolf, Romano, Mario, E., Somorjai, F., Strieder, F., Terrasi, Raiola, F, Burchard, B, Fulop, Z, Gyurky, Gy, Zeng, S, Cruz, J, Di Leva, A, Limata, B, Fonseca, M, Luis, H, Aliotta, M, Becker, Hw, Broggini, C, D'Onofrio, Antonio, Gialanella, Lucio, Imbriani, G, Jesus, Ap, Junker, M, Ribeiro, Jp, Roca, V, Rolfs, C, Romano, M, Somorjai, E, Strieder, F, and Terrasi, Filippo
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Lanthanide ,Physics ,electron screening ,Nuclear and High Energy Physics ,Hydrogen ,Screening effect ,Analytical chemistry ,chemistry.chemical_element ,Metal ,symbols.namesake ,Deuterium ,chemistry ,visual_art ,visual_art.visual_art_medium ,symbols ,Debye temperature ,Atomic physics ,Solubility ,Valence electron ,deuterated metal ,Debye model - Abstract
The electron screening in the d(d,p)t reaction has been studied for the deuterated metal Pt at a target temperature T = 20 degrees C to 340 degrees C, and for Co at T = 20 degrees C and 200 degrees C. The enhanced electron screening decreases with increasing temperature, where the data agree with the plasma model of Debye applied to the quasi-free metallic electrons. The data represent the first observation of a temperature dependence of a nuclear cross-section. We also measured the screening effect for the deuterated metal Ti (an element of group 4 of the periodic table) at T = -10 degrees C to 200 degrees C: above 50 degrees C the hydrogen solubility dropped to values far below unity and a large screening effect became observable. Similarly, all metals of groups 3 and 4 and the lanthanides showed a solubility of a few percent at T = 200 degrees C (compared to T = 20 degrees C) and a large screening became also observable. Within the Debye model the deduced number of valence electrons per metallic atom agrees with the corresponding number from the Hall coefficient, for all metals investigated. RI Fulop, Zsolt/B-2262-2008; Aliotta, Marialuisa /H-2567-2012
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- 2006
- Full Text
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19. Recoil separator ERNA: acceptances in angle and energy
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Gianluca Imbriani, A. Ordine, H. P. Trautvetter, Marialuisa Aliotta, Filippo Terrasi, Lucio Gialanella, Frank Strieder, N. DeCesare, J. Kluge, Detlef Rogalla, H. Röcken, D. Schürmann, Mario R. Romano, Carmine Lubritto, A. DiLeva, Vincenzo Roca, Antonio D'Onofrio, C. Rolfs, F. Schümann, D., Rogalla, D., Schürmann, F., Strieder, M., Aliotta, N., Decesare, DI LEVA, Antonino, C., Lubritto, A., D’Onofrio, L., Gialanella, Imbriani, Gianluca, J., Kluge, A., Ordine, Roca, Vincenzo, H., Röcken, C., Rolf, Romano, Mario, F., Schümann, F., Terrasi, H. P., Trautvetter, Rogalla, D, Schurmann, D, Strieder, F, Aliotta, M, Di Leva, A, Lubritto, Carmine, De Cesare, N, D'Onofrio, Antonio, Gialanella, Lucio, Imbriani, G, Klug, J, Ordine, A, Roca, V, Rocken, H, Rolfs, C, Romano, M, Schumann, F, Terrasi, Filippo, and Trauttvetter, H. P.
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Physics ,Nuclear and High Energy Physics ,Range (particle radiation) ,Electromagnetic radiation ,Recoil separator ,Nuclear physics ,Cross section (physics) ,Nuclear Astrophysics ,Atomic physics ,Experimental nuclear physic ,Nuclear Experiment ,Dynamitron ,Instrumentation ,Energy (signal processing) ,Beam (structure) ,Oxygen-16 - Abstract
For improved cross-section measurements of the reaction 12C(α,γ)16O in inverted kinematics, a recoil separator ERNA is developed at the 4MV Dynamitron tandem accelerator in Bochum to detect directly the 16O recoils with high efficiency. Due to the emission of the capture γ-rays, the kinematically forward directed 16O recoils are described by an angle and energy spread. Thus, the acceptances in angle and energy of ERNA must cover these spreads in order to extract reliable cross-section values. We report on such acceptance measurements over the energy range Ecm=0.7-5.0 MeV, using an 16O pilot beam. © 2003 Elsevier B.V. All rights reserved.
- Published
- 2003
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20. The E1 capture amplitude in 12C(α,γ0) 16O
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F. Strieder, Antonio D'Onofrio, A. Ordine, Marialuisa Aliotta, Filippo Terrasi, C. Agodi, Detlef Rogalla, G. Gyürki, L. Gialanella, E. Somorjai, Vincenzo Roca, L. Campajola, Gianluca Imbriani, P. Figuera, Mario R. Romano, H. P. Trautvetter, S. Theis, Uwe Greife, A. Del Zoppo, C. Rolfs, R. Alba, F. Schümann, Paolo Sapienza, Carlo Sabbarese, Gialanella, L., Rogalla, D., Strieder, F., Theis, S., Gyurki, G., Agodi, C., Alba, R., Aliotta, M., Campajola, L., Del Zoppo, A., D'Onofrio, A., Figuera, P., Greife, U., Imbriani, G., Ordine, A., Roca, V., Rolfs, C., Romano, M., Sabbarese, C., Sapienza, P., Schumann, F., Somorjai, E., Terrasi, F., Trautvetter, H. P., L., Gialanella, D., Rogalla, F., Strieder, S., Thei, G., Gyürki, C., Agodi, R., Alba, M., Aliotta, L., Campajola, A., Del Zoppo, A., D'Onofrio, P., Figuera, U., Greife, Imbriani, Gianluca, A., Ordine, Roca, Vincenzo, C., Rolf, Romano, Mario, C., Sabbarese, P., Sapienza, F., Schümann, E., Somorjai, F., Terrasi, and H. P., Trautvetter
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Physics ,Excitation function ,Nuclear and High Energy Physics ,S-factor ,Monte Carlo method ,Detector ,Hadron ,Extrapolation ,Nuclear physics ,Helium burining ,Amplitude ,Nuclear fusion ,Experimental nuclear physic ,Nuclear Astrophysic - Abstract
An excitation function of the ground-state gamma (0)-ray capture transition in C-12(alpha, gamma)O-16 at theta (gamma) = 90 degrees was obtained in far geometry using six Ge detectors, where the study of the reaction was initiated in inverse kinematics involving a windowless gas target. The detectors observed predominantly the El capture amplitude. The data at E = 1.32 to 2.99 MeV lead to an extrapolated astrophysical S factor S-E1(E-0) = 90 +/- 15 keV b at E-0 = 0.3 MeV (for the case of constructive interference between the two lowest E1 sources), in good agreement with previous works. However, a novel Monte Carlo approach in the data extrapolation reveals systematic differences between the various data sets such that a combined analysis of all available data sets could produce a biased estimate of the S-E1(E-0) value. As a consequence, the case of destructive interference between the two lowest E1 sources with S-E1(E-0) = 8 +/- 3 keV b cannot be ruled out rigorously.
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- 2001
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21. Actinides AMS at CIRCE in Caserta (Italy)
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N. De Cesare, Carlo Sabbarese, Antonio D'Onofrio, Detlef Rogalla, Francesca Quinto, Yongjing Guan, Filippo Terrasi, Vincenzo Roca, M. De Cesare, Lucio Gialanella, A. Petraglia, De Cesare, M, Gialanella, Lucio, Rogalla, D, Petraglia, A, Guan, Y, De Cesare, N, D'Onofrio, Antonio, Quinto, F, Roca, V, Sabbarese, Carlo, Terrasi, Filippo, M., De Cesare, L., Gialanella, D., Rogalla, A., Petraglia, Y., Guan, N., De Cesare, A., D’Onofrio, F., Quinto, Roca, Vincenzo, C., Sabbarese, A., D'Onofrio, Yongjing, Guan, and F., Terrasi
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Nuclear and High Energy Physics ,Isotope ,Nuclear fuel ,Optical simulation ,business.industry ,chemistry.chemical_element ,TOF-E ,electrostatic accelerators ,Actinide ,Uranium ,Nuclear power ,Plutonium ,Nuclear physics ,uranium ,chemistry ,Nuclide ,AMS ,business ,Instrumentation ,Accelerator mass spectrometry - Abstract
The operation of Nuclear Power Plants and atmospheric tests of nuclear weapons performed in the past, together with production, transport and reprocessing of nuclear fuel, lead to the release into the environment of a wide range of radioactive nuclides, such as uranium, plutonium, fission and activation products. These nuclides are present in the environment at ultra trace levels. Their detection requires sensitive techniques like AMS (Accelerator Mass Spectrometry). In order to perform isotopic ratio measurements of the longer-lived actinides, e.g., of 236U relative to the primary 238U and various Pu isotopes relative to 239Pu, an upgrade of the CIRCE accelerator (Center for Isotopic Research on Cultural and Environmental Heritage) in Caserta, Italy, is underway. In this paper we report on the results of simulations aiming to define the best ion optics and to understand the origin of possible measurement background. The design of a high resolution TOF-E (Time of Flight-Energy) detector system is described, which will be used to identify the rare isotopes among interfering background signals.
- Published
- 2010
22. Absolute cross section of p(7Be,γ)8B using a novel approach
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C. Rolfs, A. Ordine, Gianluca Imbriani, Gyuri Gyürky, Filippo Terrasi, Antonio D'Onofrio, Mario R. Romano, E. Somorjai, Lucio Gialanella, Carlo Sabbarese, H. P. Trautvetter, L. Campajola, Detlef Rogalla, Uwe Greife, Vincenzo Roca, Frank Strieder, G. Oliviero, L., Gialanella, F., Strieder, L., Campajola, A., D'Onofrio, U., Greife, G., Gyurky, Imbriani, Gianluca, G., Oliviero, A., Ordine, Roca, Vincenzo, C., Rolf, Romano, Mario, D., Rogalla, C., Sabbarese, E., Somorjai, F., Terrasi, H. P., Trautvetter, Gialanella, L., Strieder, F., Campajola, L., D'Onofrio, A., Greife, U., Gyurky, G., Imbriani, G., Oliviero, G., Ordine, A., Roca, V., Rolfs, C., Romano, M., Rogalla, D., Sabbarese, C., Somorjai, E., Terrasi, F., and Trautvetter, H. P.
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Physics ,Elastic scattering ,Nuclear and High Energy Physics ,Ion beam ,Experimental Nuclear physic ,Solar neutrinos ,Nuclear physics ,Momentum ,symbols.namesake ,Cross section (physics) ,Yield (chemistry) ,symbols ,Nuclear fusion ,Nuclear Astrphysic ,Rutherford scattering ,Nuclide ,Atomic physics - Abstract
The absolute cross section sigma(E) of the radiative capture reaction p(Be-7,gamma)B-8 at the center-of mass energy E = 992 keV has been measured using a radioactive 7Be ion beam and a windowless gas target system filled with H-2 gas. The B-8 residual nuclides were detected with a recoil separator consisting of momentum and velocity filters and a BE E detector telescope. The B-8 yield was observed concurrently with the Be-7+p elastic scattering yield, relating sigma(E) to the Rutherford scattering cross section. The resulting value, sigma(E) = 0.41+/-0.11 mu b, leads to an S(E) factor at zero energy of S(0) = 16+/-4 eV b, in fair agreement with recommended values.
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- 2000
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23. Recoil separator ERNA: charge state distribution, target density, beam heating, and longitudinal acceptance
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Vincenzo Roca, Lucio Gialanella, Gianluca Imbriani, D. Schürmann, Antonio D'Onofrio, Carmine Lubritto, J. N. Klug, A. Di Leva, H. Röcken, N. De Cesare, A. Ordine, Filippo Terrasi, H. P. Trautvetter, C. Rolfs, F. Schümann, Detlef Rogalla, Frank Strieder, Mario R. Romano, Schürmann, D., Strieder, F., DI LEVA, A., Gialanella, L., DE CESARE, N., D'Onofrio, Antonio, Imbriani, G., Klug, J., Lubritto, Carmine, Ordine, A., Roca, V., Röcken, H., Rolfs, C., Rogalla, D., Romano, M., Schümann, F., Terrasi, Filippo, Trautvetter, H. P., Schuermann, D., DI LEVA, Antonino, De Cesare, N., D'Onofrio, A., Imbriani, Gianluca, Lubritto, C., Roca, Vincenzo, Rocken, H., Romano, Mario, Schuemann, F., and Terrasi, F.
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Physics ,Nuclear and High Energy Physics ,Physics::Instrumentation and Detectors ,Projectile ,Separator (oil production) ,Charge (physics) ,Recoil separator ,Nuclear physics ,Cross section (physics) ,Nuclear Astrophysics ,Nuclear Experiment ,State distribution ,Dynamitron ,Experimental nuclear physic ,Instrumentation ,Beam (structure) - Abstract
For improved cross section measurements of the reaction 12 C ( α , γ ) 16 O in inverted kinematics, a recoil separator ERNA is developed at the 4 MV Dynamitron tandem accelerator in Bochum to detect directly the 16O recoils with high efficiency. The 16O recoils are produced by the 12C projectiles in a windowless 4He gas target. We report on the charge state distribution of the 16O recoils, the gas target density, the beam heating of the gas target, and the acceptance of the separator along the extended gas target.
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- 2004
24. Recoil separator ERNA: Gas target and beam suppression
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Lucio Gialanella, Gianluca Imbriani, N. De Cesare, Carmine Lubritto, D. Schürmann, Filippo Terrasi, Vincenzo Roca, A. Ordine, Mario R. Romano, F. Schümann, Frank Strieder, A. Di Leva, H. P. Trautvetter, Detlef Rogalla, C. Rolfs, H. Röcken, Antonio D'Onofrio, J. N. Klug, Gialanella, Lucio, Schurmann, D, Strieder, F, Di Leva, A, De Cesare, N, D'Onofrio, Antonio, Imbriani, G, Klug, J, Lubritto, Carmine, Ordine, A, Roca, V, Rocken, H, Rolfs, C, Rogalla, D, Romano, M, Schumann, F, Terrasi, Filippo, Trauttvetter, H. P., L., Gialanella, D., Schürmann, F., Strieder, DI LEVA, Antonino, N., De Cesare, A., D’Onofrio, Imbriani, Gianluca, J., Klug, C., Lubritto, A., Ordine, Roca, Vincenzo, H., Röcken, C., Rolf, D., Rogalla, Romano, Mario, F., Schümann, F., Terrasi, and H. P., Trautvetter
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Physics ,Nuclear reaction ,Nuclear and High Energy Physics ,Physics::Instrumentation and Detectors ,Projectile ,Separator (oil production) ,Electromagnetic radiation ,Recoil separator ,Nuclear physics ,Nuclear Astrophysics ,Experimental nuclear physic ,Nuclear Experiment ,Dynamitron ,Instrumentation ,Beam (structure) ,Oxygen-16 - Abstract
For improved cross-section measurements of the reaction 12C(α,γ)16O in inverted kinematics, a recoil separator ERNA is developed at the 4MV Dynamitron tandem accelerator in Bochum to detect directly the 16O recoils with high efficiency. The 16O recoils are produced by the 12C projectiles in a windowless 4He gas target. We report on the pressure profile of the gas target, the beam suppression by the separator, and the first observation of the 16O recoils at selected energies. © 2003 Elsevier B.V. All rights reserved.
- Published
- 2004
25. Astrophysical S-factor of 14N(p,)15O
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Gianluca Imbriani, F. Schümann, H. Costantini, R. Menegazzo, Gy. Gyürky, Vincenzo Roca, Pierre Descouvemont, Daniel Bemmerer, C. Rolfs, A. Guglielmetti, G. Gervino, R. Bonetti, Frank Strieder, Alberto Vomiero, P. Corvisiero, Zs. Fülöp, A. P. Jesus, A. Formicola, C. Broggini, Carmen Angulo, C. Rossi Alvarez, E. Somorjai, Sandra Zavatarelli, C. Gustavino, M. Junker, Mario R. Romano, A. Lemut, H. P. Trautvetter, Oscar Straniero, Filippo Terrasi, João Cruz, Paolo Prati, Formicola, A., Imbriani, G., Costantini, H., Angulo, C., Bemmerer, D., Bonetti, R., Broggini, C., Corvisiero, P., Cruz, J., Descouvemont, P., Fulop, Z., Gervino, G., Guglielmetti, A., Gustavino, C., Gyurky, G., Jesus, A., Junker, M., Lemut, A., Menegazzo, R., Prati, P., Roca, V., Rolfs, C., Romano, M., ROSSI ALVAREZ, C., Schumann, F., Somorjai, E., Straniero, O., Strieder, F., Terrasi, Filippo, Trautvetter, H., Vomiero, A., Zavatarelli, S., Imbriani, Gianluca, Jesus, A. P., Roca, Vincenzo, Romano, Mario, Rossi Alvarez, C., Schuemann, F., Terrasi, F., and Trautvetter, H. P.
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Physics ,Nuclear and High Energy Physics ,24.30.-v ,Solar spectra ,S-factor ,Physique ,Solar neutrino ,Direct reaction ,Resonance reaction ,CNO cycle ,Hydrostatic stellar nucleosynthesis ,Experimental physics ,Nuclear physics ,Cross section (physics) ,Globular cluster ,26.20.+f ,24.50.+g ,nuclear astrophysic ,Matrix method ,R-matrix - Abstract
We report on a new measurement of the 14N(p,γ) 15O capture cross section at Ep=140 to 400 keV using the 400 kV LUNA accelerator facility at the Laboratori Nazionali del Gran Sasso (LNGS). The uncertainties have been reduced with respect to previous measurements and their analysis. We have analyzed the data using the R-matrix method and we find that the ground state transition accounts for about 15% of the total S-factor. The main contribution to the S-factor is given by the transition to the 6.79 MeV state. We find a total S(0)=1.7±0.2 keVb, in agreement with recent extrapolations. The result has important consequences for the solar neutrino spectrum as well as for the age of globular clusters. © 2004 Elsevier B.V. All rights reserved., info:eu-repo/semantics/published
- Published
- 2004
26. Direct measurement of the absolute cross section of p(7Be,γ)8B
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Vincenzo Roca, Antonio D'Onofrio, Frank Strieder, E. Somorjai, Gianluca Imbriani, C. Rolfs, Filippo Terrasi, Carmine Lubritto, Carlo Sabbarese, H. P. Trautvetter, A. Ordine, Mario R. Romano, L. Gialanella, Detlef Rogalla, L. Campajola, Uwe Greife, Gyuri Gyürky, Terrasi, F., Gialanella, L., Imbriani, G., Strieder, F., Campajola, L., D'Onofrio, A., Greife, U., Gyurky, G., Lubritto, C., Ordine, A., Roca, V., Rolfs, C., Romano, M., Rogalla, D., Sabbarese, C., Somorjai, E., Trautvetter, H. P., F., Terrasi, L., Gialanella, Imbriani, Gianluca, F., Strieder, L., Campajola, A., D'Onofrio, U., Greife, G., Gyurky, C., Lubritto, A., Ordine, Roca, Vincenzo, C., Rolf, Romano, Mario, D., Rogalla, C., Sabbarese, E., Somorjai, and H. P., Trautvetter
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Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Cross section (physics) ,Solar Hydrogen Burining ,Absolute (philosophy) ,Experimantal nuclear physic ,Nuclear Astrophysic - Abstract
A new direct measurement of the absolute cross section of the 1H(7Be,γ)8B reaction has been performed in inverse kinematics at Ecm = 990 keV. A radioactive 7Be beam (Elab, = 8 MeV) and a windowless H2 gas target were used; 8B recoils were identified and counted by a recoil mass separator. The reaction cross section was derived by normalization to the elastic scattering cross section, measured in a separate run. The resulting value σr = 0.40 ± 0.12 μb yielded an astrophysical S-factor at zero energy So = 15.3 ± 4.5 eV b, in fair agreement with recommended values. © 2001 Elsevier Science B.V. All rights reserved.
- Published
- 2001
27. Stopping power, electron screening and the astrophysical S(E) factor of d(He-3,p)He-4
- Author
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L. Gialanella, Carlo Broggini, C. Gustavino, Gianluca Imbriani, Vincenzo Roca, Uwe Greife, A. Guglielmetti, Paolo Prati, A. Formicola, A. Fubini, F. Schumann, C. Rolfs, Detlef Rogalla, P. G. Prada Moroni, G. Gervino, A. Ordine, Oscar Straniero, Filippo Terrasi, Antonio D'Onofrio, Sandra Zavatarelli, Frank Strieder, L. Campajola, R. Bonetti, H. Costantini, P. Corvisiero, M. Junker, Mario R. Romano, H. P. Trautvetter, Costantini, H, Formicola, A, Junker, M, Bonetti, R, Broggini, C, Campajola, L, Corvisiero, P, D'Onofrio, Antonio, Fubini, A, Gervino, G, Gialanella, Lucio, Greife, U, Guglielmetti, A, Gustavino, C, Imbriani, G, Ordine, A, Moroni, Pgp, Prati, P, Roca, V, Rogalla, D, Rolfs, C, Romano, M, Schumann, F, Straniero, O, Strieder, F, Terrasi, Filippo, Trautvetter, Hp, Zavatarelli, S., H., Costantini, A., Formicola, M., Junker, R., Bonetti, C., Broggini, L., Campajola, P., Corvisiero, A., D'Onofrio, A., Fubini, G., Gervino, L., Gialanella, U., Greife, A., Guglielmetti, C., Gustavino, Imbriani, Gianluca, A., Ordine, P. G., Prada Moroni, P., Prati, Roca, Vincenzo, D., Rogalla, C., Rolf, Romano, Mario, F., Schümann, O., Straniero, F., Strieder, F., Terrasi, H. P., Trautvetter, and S., Zavatarelli
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Physics ,electron screening ,Nuclear and High Energy Physics ,Screening effect ,Experimental Nuclear physic ,Electron ,E factor ,Potential energy ,Ion ,Nuclear physics ,Cross section (physics) ,stopping power ,Nuclear Astrophysics ,Stopping power (particle radiation) ,Atomic physics ,Data reduction - Abstract
The d( 3 He,p) 4 He cross section has been measured at E =4.2 to 13.8 keV using the LUNA underground accelerator facility. The experiment was performed to determine the magnitude of the atomic screening effect and to establish values for the energy loss used in data reduction. The observed stopping power of the 3 He ions in the D 2 target is in good agreement with the standard compilation. Using these stopping power values the data lead to an electron-screening potential energy U e = 132±9 eV, which is significantly higher than the estimated value of 65 eV from an atomic-physics model.
- Published
- 2000
28. Recoil separator ERNA: Ion Beam purification'
- Author
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C. Rolfs, H. P. Trautvetter, A. Ordine, Gianluca Imbriani, Mario R. Romano, Uwe Greife, L. Campajola, S. Theis, Frank Strieder, Vincenzo Roca, Detlef Rogalla, F. Schümann, Carlo Sabbarese, Filippo Terrasi, Antonio D'Onofrio, L. Gialanella, D., Rogalla, S., Thei, L., Campajola, A., D'Onofrio, L., Gialanella, U., Greife, Imbriani, Gianluca, A., Ordine, Roca, Vincenzo, C., Rolf, Romano, Mario, C., Sabbarese, F., Schumann, F., Strieder, F., Terrasi, H. P., Trautvetter, F., Schümann, Rogalla, D, Theis, S, Campajola, L, D'Onofrio, Antonio, Gialanella, Lucio, Greife, U, Imbriani, G, Ordine, A, Roca, V, Rolfs, C, Romano, M, Sabbarese, Carlo, Schumann, F, Strieder, F, Terrasi, Filippo, and Trautvetter, Hp
- Subjects
Nuclear reaction ,Physics ,Nuclear and High Energy Physics ,Ion beam ,Particle detector ,Semiconductor detector ,Momentum ,Nuclear physics ,Nuclear Astrophysics ,Measuring instrument ,Nuclear astrophysics ,Physics::Accelerator Physics ,Atomic physics ,Experimental nuclear physic ,Instrumentation ,Beam (structure) - Abstract
For improved measurements of the key astrophysical reaction View the MathML source in inverse kinematics, a recoil separator ERNA is developed to detect directly the View the MathML source recoils with nearly 100% efficiency. Since the View the MathML source projectiles and the View the MathML source recoils have essentially the same momentum and since the View the MathML source ion beam emerging from an accelerator usually passes through a momentum filter, a sufficient absence of an View the MathML source beam contaminant in the View the MathML source ion beam is of utmost importance for ERNA. In the present work, a Wien filter together with a ΔE−E telescope are used to investigate the beam contaminants accompanying a momentum-filtered View the MathML source ion beam and to measure the level of ion beam purification achievable with the Wien filter.
- Published
- 1999
29. First hints on a change of the 22Na βdecay half-life in the metal Pd
- Author
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Vincenzo Roca, Lucio Gialanella, Hans Werner Becker, Mario R. Romano, Antonio D'Onofrio, C. Rolfs, Frank Strieder, S. Yan, B. Wang, D. Schürmann, Filippo Terrasi, F. Raiola, B. Limata, Limata, B, Raiola, F, Wang, B, Yan, S, Becker, Hw, D'Onofrio, Antonio, Gialanella, Lucio, Roca, V, Rolfs, C, Romano, M, Schurmann, D, Strieder, F, and Terrasi, Filippo
- Subjects
Metal ,Physics ,Nuclear and High Energy Physics ,symbols.namesake ,visual_art ,Hadron ,visual_art.visual_art_medium ,symbols ,Nuclear fusion ,Half-life ,Plasma ,Atomic physics ,Debye - Abstract
For the beta(+)-decay of Na-22 in the metallic environment Pd cooled to T = 12 K the Na-22 half-life was observed to be shorter by 1.2 +/- 0.2%. The result is consistent with-but lower than-the prediction of the Debye plasma model.
- Published
- 2006
- Full Text
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30. Further direct approaches to the nuclear reactions in the sun
- Author
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W.H. Schulte, H. Rebel, M. Romoli, Vincenzo Roca, Sandra Zavatarelli, Carlo Broggini, G. Oliviero, J. Lambert, E. Bellotti, Filippo Terrasi, Paolo Prati, Frank Strieder, Uwe Greife, D. Zahnow, Antonio D'Onofrio, A. Fubini, R.W. Kavanagh, G. Gervino, Lucio Gialanella, C. Gustavino, H. P. Trautvetter, L. Campajola, R. Kubat, C. Arpesella, S. Schmidt, Giovanni Fiorentini, W.S. Rodney, M. Junker, K. Brand, E. Huttel, C. Rolfs, P. Corvisiero, Mario R. Romano, Greife, U., Arpesella, C., Bellotti, E., Brand, K., Broggini, C., Campajola, L., Corvisiero, P., D'Onofrio, Antonio, Fiorentini, G., Fubini, A., Gervino, G., Gialanella, L., Gustavino, C., Huttel, E., Junker, M., Kavanagh, R. W., Kubat, R., Lambert, J., Oliviero, G., Prati, P., Rebel, H., Roca, V., Rodney, W. S., Rolfs, C., Romano, M., Romoli, M., Schmidt, S., Shulte, W. H., Strieder, F., Terrasi, Filippo, Trautvetter, H. P., Zahnow, D., and Zavatarelli, S.
- Subjects
Physics ,Nuclear reaction ,Nuclear physics ,Nuclear and High Energy Physics ,Stars ,Nucleosynthesis ,Astrophysics::High Energy Astrophysical Phenomena ,Nuclear fusion ,Cosmic ray ,Neutrino ,Nuclear Experiment ,Beam (structure) - Abstract
Nuclear fusion reactions play a key role in the understanding of energy production, neutrino emission and nucleosynthesis of the elements in stars. The direct measurement of the cross section of these reactions at the relevant energies is usually hampered by cosmic radiation, beam induced background and/or the radioactivity of the nuclei involved. The measurements are expected to be completed by fall 1996.
- Published
- 1997
31. The LUNA facility at the National Laboratory of Gran Sasso: Recent results and future activities
- Author
-
C. Rolfs, A. Guglielmetti, Antonio D'Onofrio, L. Campajola, G. Gervino, P. Corvisiero, Uwe Greife, C. Gustavino, A. D'Alessandro, Sandra Zavatarelli, F. Schueman, Lucio Gialanella, Frank Strieder, A. Ordine, Carlo Broggini, M. Dessalvi, R. Bonetti, Filippo Terrasi, H. P. Trautvetter, S. Fubini, M. Junker, Mario R. Romano, Vincenzo Roca, Paolo Prati, Prati, P., Bonetti, R., Broggini, C., Campajola, L., Corvisiero, P., Dalessandro, A., Dessalvi, M., D'Onofrio, Antonio, Fubini, S., Gervino, G., Gialanella, L., Greife, U., Guglielmetti, A., Gustavino, C., Junker, M., Ordine, A., Roca, V., Rolfs, C., Romano, M., Schueman, F., Strieder, F., Terrasi, Filippo, Trautvetter, H. P., and Zavatarelli, S.
- Subjects
Physics ,Nuclear physics ,Nuclear and High Energy Physics ,Light nucleus ,CNO cycle ,Low energy ,National laboratory - Abstract
The LUNA Collaboration has recently completed the first measurement of the 3 He( 3 He,2p) 4 He reaction in the Gamow peak region. A new phase, based on a new, 400 kV accelerator, has started and it is aimed to the study, at very low energy, of other relevant reactions of the p-p chain and of the CNO cycle. Measurements of electron screening effects are also planned.
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