Advanced

Delayed g9/2 Alignment in the N=Z Nucleus 72Kr

de Angelis, G.; Fahlander, Claes LU ; Gadea, A.; Farnea, E.; Gelletly, W.; Aprahamian, A.; Bazzacco, D.; Becker, F.; Bizzeti, P. G. and Bizzeti-Sona, A., et al. (1997) In Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics 415(3). p.217-222
Abstract
The structure of Kr-72 has been investigated at GASP through the Ca-40(Ca-40,2 alpha) reaction at a beam energy of 160 MeV using the 4 pi ISIS Si-ball for reaction channel selection. The level scheme has been extended up to an excitation energy of approximate to 8.5 MeV. The spins and parities of the observed levels are assigned tentatively. The observed band shows the predicted change from oblate to prolate shape. The four quasi-particle g(9/2) alignment is found to be significantly delayed in rotational frequency with respect to the heavier Kr isotopes. Such a delay contradicts the predictions of standard mean-field calculations and may reflect either additional correlations in the T = 0 pairing channel or coupling to vibrational degrees... (More)
The structure of Kr-72 has been investigated at GASP through the Ca-40(Ca-40,2 alpha) reaction at a beam energy of 160 MeV using the 4 pi ISIS Si-ball for reaction channel selection. The level scheme has been extended up to an excitation energy of approximate to 8.5 MeV. The spins and parities of the observed levels are assigned tentatively. The observed band shows the predicted change from oblate to prolate shape. The four quasi-particle g(9/2) alignment is found to be significantly delayed in rotational frequency with respect to the heavier Kr isotopes. Such a delay contradicts the predictions of standard mean-field calculations and may reflect either additional correlations in the T = 0 pairing channel or coupling to vibrational degrees of freedom or both. (C) 1997 Elsevier Science B.V. (Less)
Please use this url to cite or link to this publication:
author
, et al. (More)
(Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
415
issue
3
pages
217 - 222
publisher
Elsevier
external identifiers
  • scopus:0043133747
ISSN
0370-2693
DOI
10.1016/S0370-2693(97)01217-3
language
English
LU publication?
no
id
e62a2091-3037-45f6-b7bc-ec4a5d94e6f8 (old id 3963406)
alternative location
http://www.sciencedirect.com/science/article/pii/S0370269397012173
date added to LUP
2013-08-13 18:21:39
date last changed
2017-11-19 04:06:08
@article{e62a2091-3037-45f6-b7bc-ec4a5d94e6f8,
  abstract     = {The structure of Kr-72 has been investigated at GASP through the Ca-40(Ca-40,2 alpha) reaction at a beam energy of 160 MeV using the 4 pi ISIS Si-ball for reaction channel selection. The level scheme has been extended up to an excitation energy of approximate to 8.5 MeV. The spins and parities of the observed levels are assigned tentatively. The observed band shows the predicted change from oblate to prolate shape. The four quasi-particle g(9/2) alignment is found to be significantly delayed in rotational frequency with respect to the heavier Kr isotopes. Such a delay contradicts the predictions of standard mean-field calculations and may reflect either additional correlations in the T = 0 pairing channel or coupling to vibrational degrees of freedom or both. (C) 1997 Elsevier Science B.V.},
  author       = {de Angelis, G. and Fahlander, Claes and Gadea, A. and Farnea, E. and Gelletly, W. and Aprahamian, A. and Bazzacco, D. and Becker, F. and Bizzeti, P. G. and Bizzeti-Sona, A. and Brandolini, F. and de Acuna, D. and De Poli, M. and Eberth, J. and Foltescu, D. and Lenzi, S. M. and Lunardi, S. and Martinez, T. and Napoli, D. R. and Pavan, P. and Petrache, C. M. and Alvarez, C. R. and Rudolph, Dirk and Rubio, B. and Satula, W. and Skoda, S. and Spolaore, P. and Thomas, H. G. and Ur, C. A. and Wyss, R.},
  issn         = {0370-2693},
  language     = {eng},
  number       = {3},
  pages        = {217--222},
  publisher    = {Elsevier},
  series       = {Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics},
  title        = {Delayed g9/2 Alignment in the N=Z Nucleus 72Kr},
  url          = {http://dx.doi.org/10.1016/S0370-2693(97)01217-3},
  volume       = {415},
  year         = {1997},
}