{beta} decay of neutron-rich {sup 53-56}Ca

Journal Article · Tue Jan 15 04:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.014313· OSTI ID:21068047

Mantica, P F; Crawford, H L; Damaske, A; Pinter, J S; Stoker, J B ^[1]; Broda, R; Fornal, B ^[2]; Hecht, A A; Hoteling, N ^[3]; Hoffman, C; Tabor, S L; Walters, W B ^[4]; Horoi, M ^[5]; Janssens, R V. F.; Zhu, S ^[6]; Pereira, J ^[1]; Sumikama, T ^[7]; Wang, X ^[6]

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1. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
2. Institute of Nuclear Physics, Polish Academy of Sciences, PL-31342, Cracow (Poland)
3. Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742 (United States)
4. Department of Physics and Astronomy, Florida State University, Tallahassee, Florida 32306 (United States)
5. Department of Physics, Central Michigan University, Mount Pleasant, Michigan 48859 (United States)
6. Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
7. RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198 (Japan)

{beta}-decay properties of neutron-rich Ca isotopes have been obtained. Half-life values were determined for the first time for {sup 54}Ca (86{+-}7 ms), {sup 55}Ca (22{+-}2 ms), and {sup 56}Ca (11{+-}2 ms). The half-life of 230{+-}60 ms deduced for {sup 53}Ca is significantly longer than reported previously, where the decay chain {sup 53}K {yields} {sup 53}Ca {yields} {sup 53}Sc was considered. A delayed {gamma} ray with an energy of 247 keV was identified following {beta} decay of {sup 54}Ca and is proposed to depopulate the 1{sub 1}{sup +} level in {sup 54}Sc. The {beta}-decay properties compare favorably with the results of shell-model calculations completed in the full pf space with the GXPF1 interaction. The half-lives of the neutron-rich Ca isotopes are also compared with gross {beta}-decay theory. The systematic trend of the neutron-rich Ca half-lives is consistent with the presence of a subshell gap at N=32.

• OSTI ID: 21068047
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 77; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
CALCIUM 53
CALCIUM 54
CALCIUM 55
CALCIUM 56
COMPARATIVE EVALUATIONS
ENERGY LEVELS
GAMMA RADIATION
HALF-LIFE
KEV RANGE
NEUTRONS
NUCLEAR STRUCTURE
NUCLEON-NUCLEON INTERACTIONS
POTASSIUM 53
SCANDIUM 53
SCANDIUM 54
SHELL MODELS