- V. Paar (Univ. Zagreb) - Low-lying levels of /sup 77/Se
studied by thermal neutron capture and evidence for a new term in the E2
operator of TQM (IBM).
- Accession Number
- 002487566
- Author
- Tokunaga
Y. Seyfarth
H. Meyer
RA. Schult
OWB. Borner
HG. Barreau
G. Faust
HR. Schreckenbach
K. Brant
S. Paar
V. Vouk
M. Vretenar
D.
- Institution
- Inst. fur Kernphys., KFA Julich, West Germany.
- Title
- Low-lying levels of /sup 77/Se studied by thermal neutron capture and
evidence for a new term in the E2 operator of TQM (IBM).
- Source
- Nuclear Physics A, vol.A439, no.3, 17 June 1985, pp.427-55. Netherlands.
- Country of Publication
- Netherlands.
- Abstract
- A high-resolution study of the /sup 76/Se(n, gamma ) reaction was carried
out with curved-crystal and pair spectrometers and conversion electrons were
measured following slow-neutron capture. The resulting data yield very
precise level energies and spin and parity assignments for most of the
levels. The neutron separation energy of /sup 77/Se was measured as
7418.85+or-0.07 keV. The experimental data were compared with theoretical
results for the level energies in /sup 77/Se and the E2, M1 and E1 branching
ratios obtained from the SU(6) particle-vibration model (PTQM). The authors
used /sup 76/Se as a slightly perturbed SU(5) vibrational core and the
particle-vibration interaction strengths from the PTQM calculation for /sup
75/Se. In this frame there is evidence for a triangle n=2 term in the E2
operator. This term has not been included so far in TQM and IBM calculations.
(44 References).
- Abstract Number
- A85083889
- Subject Headings
- Neutron
radiative capture. Nuclear
collective model. Nuclear
energy level transitions. Nuclear
spin and parity. Nuclei
with mass number 59 to 89. SU
/ sub
n .
- Key Phrase Identifiers
- E1;
level
energies; level
spins; level
parities; SU(6)
model; thermal
neutron capture; E2
operator; /sup
76/Se(n, gamma ); M1;
branching
ratios; SU(5)
vibrational core; particle-vibration
interaction; PTQM
calculation; IBM
calculations.
- Classification Codes
- Nuclear spin, parity, and isobaric spin [A2110H]; Nuclear level density
and structure [A2110M]; Nuclear collective models [A2160E]; Nuclear models
based on group theory [A2160F]; Lifetimes and transition probabilities of
nuclei [A2320C]; Nuclear gamma transitions and level energies [A2320L];
Properties of nuclei with 59
- Treatment
- Theoretical or mathematical. Experimental.
- CODEN
- NUPABL
- Language
- English.
- ISSN
- 0375-9474.
- Publication Type
- Journal Paper.
- Update Code
- 198500.