Ansari, S., Regis, J. -M., Jolie, J., Saed-Samii, N., Warr, N., Korten, W., Zielinska, M., Salsac, M. -D., Blanc, A., Jentschel, M., Koster, U., Mutti, P., Soldner, T., Simpson, G. S., Drouet, F., Vancraeyenest, A., de France, G., Clement, E., Stezowski, O., Ur, C. A., Urban, W., Regan, P. H., Podolyak, Zs., Larijani, C., Townsley, C., Carroll, R., Wilson, E., Mach, H., Fraile, L. M., Paziy, V., Olaizola, B., Vedia, V., Bruce, A. M., Roberts, O. J., Smith, J. F., Scheck, M., Kroell, T., Hartig, A. -L., Ignatov, A., Ilieva, S., Lalkovski, S., Marginean, N., Otsuka, T., Shimizu, N., Togashi, T. and Tsunoda, Y. (2017). Experimental study of the lifetime and phase transition in neutron-rich Zr-98,Zr-100,Zr-102. Phys. Rev. C, 96 (5). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9993

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Abstract

Rapid shape changes are observed for neutron-rich nuclei with A around 100. In particular, a sudden onset of ground-state deformation is observed in the Zr and Sr isotopic chains at N = 60: Low-lying states in N <= 58 nuclei are nearly spherical, while those with N >= 60 have a rotational character. Nuclear lifetimes as short as a few picoseconds can be measured using fast-timing techniques with LaBr3(Ce) scintillators, yielding a key ingredient in the systematic study of the shape evolution in this region. We used neutron-induced fission of Pu-241 and U-235 to study lifetimes of excited states in fission fragments in the A similar to 100 region with the EXILL-FATIMA array located at the PF1B cold neutron beam line at the Institut Laue-Langevin. In particular, we applied the generalized centroid difference method to deduce lifetimes of low-lying states for the nuclei Zr-98 (N = 58), Zr-100, and Zr-102 (N >= 60). The results are discussed in the context of the presumed phase transition in the Zr chain by comparing the experimental transition strengths with the theoretical calculations using the interacting boson model and the Monte Carlo shell model.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Ansari, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Regis, J. -M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jolie, J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Saed-Samii, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Warr, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Korten, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zielinska, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Salsac, M. -D.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Blanc, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Jentschel, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Koster, U.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mutti, P.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Soldner, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Simpson, G. S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Drouet, F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vancraeyenest, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
de France, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Clement, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stezowski, O.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ur, C. A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Urban, W.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Regan, P. H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Podolyak, Zs.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Larijani, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Townsley, C.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Carroll, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Wilson, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Mach, H.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fraile, L. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Paziy, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Olaizola, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vedia, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bruce, A. M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Roberts, O. J.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Smith, J. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Scheck, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kroell, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Hartig, A. -L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ignatov, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ilieva, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Lalkovski, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marginean, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Otsuka, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Shimizu, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Togashi, T.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Tsunoda, Y.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-210933
DOI: 10.1103/PhysRevC.96.054323
Journal or Publication Title: Phys. Rev. C
Volume: 96
Number: 5
Date: 2017
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 2469-9993
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
SHAPE COEXISTENCE; FISSION FRAGMENTS; EXCITED-STATES; ZR-100; NUCLEI; SR-98; DEFORMATIONS; REGIONMultiple languages
Physics, NuclearMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/21093

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