Abstract
In this paper, the structure evolution in 158Er and185Os isotopes is calculated using the projected shell model (PSM) framework. The yrast spectrum, nucleon-rich effects, back-bending phenomenon, and the ratio of reduced electromagnetic transition probabilities, B(M1)/B(E2), are calculated in the spins ranges 8+–22+ and 17/2+–45/2+ for the mentioned isotopes, respectively. In the yrast spectrum, band crossing of one, two, and three quasi-particle bands at spins around 12+ and 41/2+, which is a sign of nucleon alignments, is investigated and 27 additional nucleons are found to be the reasons for back bending at lower spins in 158Er than 185Os, which is coincident with two great drops in the B(M1)/B(E2) ratio plots.
Similar content being viewed by others
References
R.F. Casten, Nuclear Structure from a Simple Perspective (Oxford, New York, 1990).
S.G. Nilsson, Math. Phys. Med. 16, 3 (1955)
K. Hara, Y. Sun, Int. J. Mod. Phys. E 4, 637 (1995)
Y. Sun, K. Hara, Comput. Phys. Commun. 104, 245 (1997)
A. Ansari, S. Nair, Nucl. Phys. A 163, 56 (1971)
N. Nica, Nucl. Data Sheets 141, 1 (2017)
A. Faessler, M.T. Ploszajczak, Phys. Lett. B 76, 1 (1978)
L. Lin, C. Chang, J. Phys. G Nucl. Phys. 7, L25 (1981)
T. Bengtsson, Nucl. Phys. A 512, 124 (1990)
M. Ploszajczak, A. Faessler, Nucl. Phys. A 379, 77 (1982)
J.A. Sheikh, G.H. Bhat, Y. Sun, G.B. Vakil, R. Palit, Phys. Rev. C 77, 034313–034321 (2008)
J. Simpson, M. Riley, J. Sharpey-Schafer, J. Bacelar, A. Cook, J. Cresswell, D. Elenkov, P. Forsyth, G. Hagemann, B. Herskind, Phys. G: Nucl. Part. Phys. 15, 643 (1989)
M. Oshima, N. Johnson, F. McGowan, C. Baktash, I. Lee, Y. Schutz, R.V. Ribas, J.C. Wells, Phys. Rev. C 33, 1988 (1986)
M.A. Riley, J. Simpson, E.S. Paul, Phys. Scr. 91, 123002 (2016)
M. Shahriarie, S. Mohammadi, Z. Firouzi, J. Korean Phys. Soc. 76, 8 (2020)
M.R. Gunye, A. Kumar, Pramana 14, 223 (1980)
T. Shizuma, S. Mitarai, G. Sletten, R.A. Bark, N.L. Gjrup, H.J. Jensen, M. Piiparinen, J. Wrzesinski, Y.R. Shimizu, Phys. Rev. C 69, 024305 (2004)
C.Y. Wu, D. Cline, A.B. Hayes, M.W. Simon, Phys. Rev. C 64, 014307 (2001)
S. Mohammadi, Z. Poldolak, G. De Angelis, M. Axiotis, D. Bazzacco, P.G. Bizzeti, F. Brandolini, R. Broda, D. Bucurescu, E. Franea, W. Gelletly, A. Gadea, M. Ionescu-Bujor, A. Iordachescu, T.H. Kroll, S. Longdown, S. Lunardi, N. Marginean, T. Martinez, N.H. Medina, B. Quintana, P.H. Regan, B. Rubio, C.A. Ur, J.-J. Valiente Dobon, P.M. Walker, Y.H. Zhang, Braz. J. Phys. 34, 792 (2004)
S. Mohammadi, Z. Poldolak, Iran. J. Sci. Thec. 31, 1 (2007)
A.R. Binesh, S. Mohammadi, Res. J. Phys. 3, 32 (2009)
S. Mohammadi, Iran. J. Sci. Thec. 34, 13 (2010)
J.A. Sheikh, Y. Sun, P.M. Walker, Phys. Rev. C 57, R26 (1998)
J. Bardeen, L.N. Cooper, J.R. Schrieffer, Phys. Rev. 108, 1175 (1957)
P. Möller, A.J. Sierk, T. Ichikawa, H. Sagawa, At. Data Nucl. Data Tables 109, 1 (2016)
A. Bohr, B.R. Mottelson, Nuclear Structure, Sec 3, vol. I (World Scientific, Singapore, 1998).
B. Castel, I.S. Towner, Modern Theories of Nuclear Moments, Sec and 4 (Clarendon Press, Oxford, 1990).
B. Alex, Lecture Notes in Nuclear Structure Physics, Sec 4 (National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan, 2005).
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Moonesi, M., Haghpeima, A. & Shahriari, M. Study of the nucleon-rich effect in 158Er and 185Os rare-earth nuclei using the projected shell model. J. Korean Phys. Soc. 78, 651–656 (2021). https://doi.org/10.1007/s40042-021-00127-w
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s40042-021-00127-w