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Your search keyword '"Stoyer, M A"' showing total 19 results
Start Over Author "Stoyer, M A" Topic neutrons
19 results on '"Stoyer, M A"'

1. NEW INSIGHTS INTO THE NUCLEAR STRUCTURE IN NEUTRON-RICH 112,114,115,116,117,118Pd.

Author

LUO, Y. X., RASMUSSEN, J. O., HAMILTON, J. H., RAMAYYA, A. V., FRAUENDORF, S., HWANG, J. K., STONE, N. J., ZHU, S. J., BREWER, N. T., WANG, E., LEE, I. Y., TER-AKOPIAN, G. M., LIU, S. H., DANIEL, A. V., OGANESSIAN, YU. TS., STOYER, M. A., DONANGELO, R., MA, W. C., COLE, J. D., and SHI, YUE

Subjects
NUCLEAR structure, NEUTRONS, NUCLEAR physics, COULOMB functions, CHIRALITY of nuclear particles
Published
2013

2. EVIDENCE FOR CHIRAL DOUBLET BANDS IN 110,112Ru.

Author

LUO, Y. X., ZHU, S. J., HAMILTON, J. H., RASMUSSEN, J. O., RAMAYYA, A. V., GOODIN, C., LI, K., HWANG, J. K., CHE, X. L. ., JANG, Z., FRAUENDORF, S., DIMITROV, V., JING-YE ZHANG, STEFANESCU, I., GELBERG, A., TER-AKOPIAN, G. M., DANIEL, A. V., STOYER, M. A., DONANGELO, R., and COLE, J. D.

Subjects
RUTHENIUM isotopes, CHIRALITY of nuclear particles, NEUTRONS, NUCLEAR deformation, RADIOACTIVE decay
Published
2008

3. IDENTIFICATION OF HIGH SPIN STATES IN 137,138Cs NUCLEI AND SHELL MODEL CALCULATIONS.

Author

LI, K., LUO, Y. X ., HWANG, J. K., RAMAYYA, A. V., HAMILTON, J. H., ZHU, S. J., GOODIN, C., CROWELL, H. L., RASMUSSEN, J. O., LEE, I. Y., WU, S. C., COVELLO, A., GARGANO, A., DONANGELO, R., TER-AKOPIAN, G. M., DANIEL, A. V., COLE, J. D., MA, W. C., and STOYER, M. A.

Subjects
ELECTRON spin states, NUCLEAR shell theory, CESIUM isotopes, PROTONS, NEUTRONS
Published
2008

4. Search For Enhanced Alpha Preformation in the N=Z+1 Nuclei 113Ba, 109Xe, 105Te.

Author

Hecht, A. A., Lister, C. J., Davids, C. N., Heinz, A., Hoteling, N., Mazzocchi, C., Palombo, J., Seweryniak, D., Shergur, J., Stoyer, M., Walters, W. B., Woods, P. J., and Zhu, S.

Subjects
ALPHA decay, ISOBARIC spin, NUCLEAR physics, PHYSICAL sciences, NEUTRONS
Abstract

α-decay is known in a few cases just above 100Sn. The lowest isospin nuclei in which it has been observed are the Tz=1 nuclei 114Ba, 110Xe, and 106Te. For the next lower isospin with Tz=1/2, N=Z+1, we used the reactions 58Ni + 58Ni and 58Ni + 54Fe to search for the 113Ba→109Xe→105Te→101Sn α-decay chain. We found no candidates in our study. We set upper limits on the production of 113Ba via the 58Ni + 58Ni reaction and upper limits on the production of 109Xe via the 58Ni + 54Fe reaction. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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5. UNEXPECTED DECREASE IN MOMENT OF INERTIA BETWEEN N = 98 -100 IN 162,164GD.

Author

JONES, E. F., HAMILTON, J. H., GORE, P. M., RAMAYYA, A. V., HWANG, J. K., DELIMA, A. P., ZHU, S. J., LU0, Y. X., BEYER, C. J., KORMICKI, J., ZHANG, X. Q., MA, W. C., LEE, I. Y., RASMUSSEN, J. O., WU, S. C., GINTER, T. N., FALLON, P., STOYER, M., COLE, J. D., and DANIEL, A. V.

Subjects
NUCLEAR physics, YRAST states, NEUTRONS, PROTONS, NUCLEAR structure
Published
2005

6. TRANSITION MATRIX ELEMENTS IN NEUTRON-RICH FISSION FRAGMENTS.

Author

KRÜCKEN, R., HUTTER, C., COOPER, J. R., BARTON, C. J., SHAWCROSS, M., APRAHAMIAN, A., BEAUSANG, C. W., CAPRIO, M. A., CASTEN, R. F., CHOU, W.-T., CLARK, R. M., CLINE, D., CROMAZ, M., HECHT, A. A., MACCHIAVELLI, A. O., PIETRALLA, N., STOYER, M. A., WU, C. Y., and ZAMFIR, N. V.

Subjects
FISSION neutrons, FINITE nuclei, GAMMASPHERE, PHASE transitions, NEUTRONS
Published
2003

7. HOT BIMODAL TERNARY FISSION IN 252CF.

Author

FONG, D., JANDEL, M., HAMILTON, J. H., RAMAYYA, A. V., HWANG, J. K., GORE, P., KORMICKI, J., LUO, Y. X., KLIMAN, J., KRUPA, L., DANIEL, A. V., FOMICHEV, A., POPEK0, G. S., RODIN, A., TER-AKOPIAN, G. M., OGANESSIAN, Y. T., RASMUSSEN, J. O., MACCHIAVELLI, A. O., LEE, I. Y., and STOYER, M. A.

Subjects
NUCLEAR fission, BINARY fission (Nuclear physics), NEUTRONS, KINETIC energy, NUCLEAR excitation
Published
2003

8. LEVEL STRUCTURE OF 141BA AND I39XE AND LEVEL SYSTEMATICS OF N=85 EVEN-ODD ISOTONES.

Author

LUO, Y. X., Rasmussen, J. O., Hamilton, J. H., Ramayya, A. V., Hwang, J. K., Beyer, C. J., Zhu, S. J., Kormicki, J., Zhang, X. Q., Jones, E. F., Gore, P. M., Ginter, T. N., Lee, I. Y., Gregorich, K. E., Macchiavelli, A. O., Ter-Akopian, G. M., Oganessian, Yu.Ts., Daniel, A. V., Stoyer, M. A., and Asztalos, S. J.

Subjects
NUCLEAR shell theory, NEUTRONS, QUASIPARTICLES, HEAVY ion collisions, NUCLEAR physics
Published
2003

9. NUCLEAR STRUCTURE OF NEUTRON-RICH N=83 ISOTONES BY 252CF FISSION AT GAMMASPHERE.

Author

Luo, Y. X., Rasmussen, J. O., Hamilton, J. H., Ramayya, A.V., Hwang, J. K., Beyer, C. J., Zhu, S. J., Kormicki, J., Zhang, X. Q., Jones, E. F., Gore, P. M., Ginter, T. N., Lee, I. Y., Gregorich, K. E., Macchiavelli, A. O., Ter-Akopian, G. M., Oganessian, Yu.Ts., Daniel, A.V., Stoyer, M. A., and Asztalos, S. J.

Subjects
NUCLEAR structure, NEUTRONS, NUCLEAR fission, GAMMASPHERE, NUCLEAR physics
Published
2003

10. STUDY ON NEUTRON-RICH NUCLEI NEAR 132SN FROM THE SPONTANEOUS FISSION OF 252CF.

Author

HWAN, J. K., RAMAYYA, A. V., HAMILTON, J. H., LUO, Y. X., GORE, P. M., BEYER, C. J., ZHANG, X. Q., KORMICKI, J., RASMUSSEN, J. O., WU, S. C., FOLDEN, C. M., FALLON, P., ZIELINSKI, P., GREGORICH, K. E., MACCHIAVELLI, A. O., IYANG LEE, GINTER, T. N., STOYER, M., COLE, J. D., and DONANGELO, R.

Subjects
HIGH spin physics, NEUTRONS, NUCLEAR fission, ISOTOPES, ISOMERS
Published
2003

11. Half-life measurement of excited states in neutron-rich nuclei.

Author

Hwang, J. K., Ramayya, A. V., Hamilton, J. H., Fong, D., Beyer, C. J., Li, K., Gore, P. M., Jones, E. F., Luo, Y. X., Rasmussen, J. O., Zhu, S. J., Wu, S. C., Lee, I. Y., Stoyer, M. A., Cole, J. D., Ter-Akopian, G. M., Daniel, A., and Donangelo, R.

Subjects
NEUTRONS, EXOTIC nuclei, EXCITED state chemistry, NUCLEAR physics, PHYSICS
Abstract

Half-lives ( T1/2) of several states which decay by delayed γ transitions were determined from time-gated triple γ coincidence method. We determined, for the first time, the half-life of 330.6 + x state in 108Tc and the half-life of 19/2- state in 133Te based on the new level schemes. Five half-lives of 95, 97Sr, 99Zr, 134Te and 137Xe are consistent with the previously reported ones. These results indicate that this new method is useful for measuring the half-lives. [ABSTRACT FROM AUTHOR]

Published
2005
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12. Shape transitions and triaxiality in neutron-rich odd-mass Y and Nb isotopes.

Author

Luo, Y. X., Rasmussen, J. O., Hamilton, J. H., Ramayya, A. V., Gelberg, A., Stefanescu, I., Hwang, J. K., Zhu, S. J., Gore, P. M., Fong, D., Jones, E. F., Wu, S. C., Lee, I. Y., Ginter, T. N., Ma, W. C., Ter-Akopian, G. M., Daniel, A. V., Stoyer, M. A., and Donangelo, R.

Subjects
NUCLEAR fission, NUCLEAR reactions, DELAYED neutrons, NEUTRONS, NUCLEAR physics, PHYSICS
Abstract

New level schemes of 99, 101Y and 101, 105Nd are established based on the measurement of prompt γ-rays from the fission of 252Cf at Gammasphere. Triaxial-rotor-plus-particle model calculations and fitting suggest that in the A ≈ 100 neutron-rich nuclei triaxial shape is prevalent in the region with Z > 41. [ABSTRACT FROM AUTHOR]

Published
2005
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13. Investigations of short half-life states from SF of 252Cf.

Author

Fong, D., Hwang, J. K., Ramayya, A. V., Hamilton, J. H., Beyer, C. J., Li, K., Gore, P. M., Jones, E. F., Luo, Y. X., Rasmussen, J. O., Zhu, S. J., Wu, S. C., Lee, I. Y., Fallon, P., Stoyer, M. A., Asztalos, S. J., Ginter, T. N., Cole, J. D., Ter-Akopian, G. M., and Daniel, A.

Subjects
NEUTRONS, EXOTIC nuclei, NUCLEAR physics, BETA decay, PHYSICS
Abstract

By using different time-gated triple γ coincidence data, the half-lives ( T1/2) of several short lived states in neutron-rich nuclei have been studied. The first excited states in the ground state bands often decay by delayed γ emission. By creating triple γ coincidence spectra with time windows of 8, 16, 20, 28, and 48 ns, we have studied states with half-lives below 10 ns. The estimated half-lives of 102Zr, 137Xe, and 143Ba are in reasonable agreement with previously reported values. We extract the first estimates of the half lives of the 2+ states in 104Zr and 152Ce. [ABSTRACT FROM AUTHOR]

Published
2005
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14. Unexpected rapid variations in odd-even level staggering in gamma-vibrational bands.

Author

Gore, P. M., Jones, E. F., Hamilton, J. H., Ramayya, A. V., Zhang, X. Q., Hwang, J. K., Luo, Y. X., Li, K., Zhu, S. J., Ma, W. C., Rasmussen, J. O., Lee, I. Y., Stoyer, M., Cole, J. D., Daniel, A. V., Ter-Akopian, G. M., Oganessian, Yu. Ts., Donangelo, R., and Gupta, J. B.

Subjects
NUCLIDES, PARTICLES (Nuclear physics), ENERGY levels (Quantum mechanics), NUCLEAR excitation, NEUTRONS, NUCLEAR physics
Abstract

Triple-γ coincidence data were used to study the γ-vibrational bands to 14+ in 104-106Mo, to 13+ in 108,110Ru and 17+ in 112Ru, and to 13+, 15+ in 112-116Pd. The even-odd spin energy level splittings show rapid variations with spin and neutron number in these nuclides. With one exception, the Sm-Pt nuclei show no such reversal and much smaller staggering. [ABSTRACT FROM AUTHOR]

Published
2005
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