A New Type of Band Crossing at Large Deformation
(1996) In Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics 374(4). p.277-282- Abstract
- A detailed study of the positive parity yrast and yrare rotational bands in Rb-77 is presented. Using the reaction Ca-40(Ca-40,3p) and the EUROGAM I spectrometer, gamma gamma gamma coincidences enabled us to follow both bands over a large spin range and to measure many E2 strengths. The moments of inertia and transition quadrupole moments indicate that a more deformed band (epsilon(2) approximate to 0.38) is crossed by a less deformed one (epsilon(2) approximate to 0.29), Since the yrare band starts at the extremely low spin value of I = 9/2, the conventional band crossing mechanism of two aligning high-j quasiparticles is excluded. The frequency-dependent equilibrium shapes were calculated with Nilsson-Strutinsky type calculations using a... (More)
- A detailed study of the positive parity yrast and yrare rotational bands in Rb-77 is presented. Using the reaction Ca-40(Ca-40,3p) and the EUROGAM I spectrometer, gamma gamma gamma coincidences enabled us to follow both bands over a large spin range and to measure many E2 strengths. The moments of inertia and transition quadrupole moments indicate that a more deformed band (epsilon(2) approximate to 0.38) is crossed by a less deformed one (epsilon(2) approximate to 0.29), Since the yrare band starts at the extremely low spin value of I = 9/2, the conventional band crossing mechanism of two aligning high-j quasiparticles is excluded. The frequency-dependent equilibrium shapes were calculated with Nilsson-Strutinsky type calculations using a diabatic tracing of configurations near the neutron Fermi level, This is the first observation of such a band crossing. (Less)
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https://lup.lub.lu.se/record/3963865
- author
- organization
- publishing date
- 1996
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
- volume
- 374
- issue
- 4
- pages
- 277 - 282
- publisher
- Elsevier
- external identifiers
-
- scopus:0010990618
- ISSN
- 0370-2693
- DOI
- 10.1016/0370-2693(96)00184-0
- language
- English
- LU publication?
- no
- additional info
- 4
- id
- 4ecef4db-f7fa-4e47-8ef5-7deb1f188f01 (old id 3963865)
- alternative location
- http://www.sciencedirect.com/science/article/pii/0370269396001840
- date added to LUP
- 2016-04-01 15:46:42
- date last changed
- 2022-01-28 07:00:28
@article{4ecef4db-f7fa-4e47-8ef5-7deb1f188f01, abstract = {{A detailed study of the positive parity yrast and yrare rotational bands in Rb-77 is presented. Using the reaction Ca-40(Ca-40,3p) and the EUROGAM I spectrometer, gamma gamma gamma coincidences enabled us to follow both bands over a large spin range and to measure many E2 strengths. The moments of inertia and transition quadrupole moments indicate that a more deformed band (epsilon(2) approximate to 0.38) is crossed by a less deformed one (epsilon(2) approximate to 0.29), Since the yrare band starts at the extremely low spin value of I = 9/2, the conventional band crossing mechanism of two aligning high-j quasiparticles is excluded. The frequency-dependent equilibrium shapes were calculated with Nilsson-Strutinsky type calculations using a diabatic tracing of configurations near the neutron Fermi level, This is the first observation of such a band crossing.}}, author = {{Harder, A. and Lieb, K. P. and Cunningham, R. and Gelletly, W. and Gross, C. J. and Hannachi, F. and Kabadiyski, M. K. and Roth, H. A. and Rudolph, Dirk and Simpson, J. and Skeppstedt, O. and Varley, B. J. and Warner, D. D.}}, issn = {{0370-2693}}, language = {{eng}}, number = {{4}}, pages = {{277--282}}, publisher = {{Elsevier}}, series = {{Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics}}, title = {{A New Type of Band Crossing at Large Deformation}}, url = {{http://dx.doi.org/10.1016/0370-2693(96)00184-0}}, doi = {{10.1016/0370-2693(96)00184-0}}, volume = {{374}}, year = {{1996}}, }