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Low Energy Levels in Ni-72

Sawicka, M, Grzywacz, R, Matea, I, Grawe, H, Pfutzner, M, Daugas, J M, Lewitowicz, M, Balabanski, D L, Becker, F, Belier, G, Bingham, C, Borcea, C, Bouchez, E, Buta, A, La Commara, M, Dragulescu, E, de France, G, Georgiev, G, Giovinazzo, J, Gorska, M, Hammache, F, Hass, M, Hellstrom, M, Ibrahim, F, Janas, Z, Mach, H, Mayet, P, Meot, V, Negoita, F, Neyens, G, Santos, F D, Page, R D, Perru, O, Podolyak, Z, Roig, O, Rykaczewski, K P, Saint-Laurent, M G, Sauvestre, J E, Sorlin, O, Stanoiu, M, Stefan, I, Stodel, C, Theisen, C, Verney, D and Zylicz, J (2003) Low Energy Levels in Ni-72 Physical Review C, 68 (4).

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Abstract

The yrast J(pi)=8(+) states in neutron-rich Ni-70,Ni-72,Ni-74,Ni-76 nuclei are predicted to be isomeric. The present paper describes two GANIL experiments. In the first of them a search was made for the 8(+) isomeric states in Ni-72,Ni-74 nuclei via fragmentation of Ge-76 using the ion gamma-decay correlation technique. Although these states were not observed, limits for their lifetimes were determined. In the second experiment the decay spectroscopy of Co-70,Co-72 nuclei was performed using fragmentation of a Kr-86(36+) beam and the new LISE2000 spectrometer. The beta delayed gamma rays from the decay of Co-70,Co-72 to Ni-70,Ni-72 were observed using the EXOGAM germanium detectors. The half life of Co-72 was measured to be 62(3) ms and the level sequence of the lowest excited states in Ni-72 was suggested, with the 2(+) state at 1096 keV. An attempt to reproduce the level scheme in terms of shell-model calculations was undertaken. The reasons for the disappearance of the 8(+) isomer in Ni-72 are discussed.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
AuthorsEmailORCID
Sawicka, MUNSPECIFIEDUNSPECIFIED
Grzywacz, RUNSPECIFIEDUNSPECIFIED
Matea, IUNSPECIFIEDUNSPECIFIED
Grawe, HUNSPECIFIEDUNSPECIFIED
Pfutzner, MUNSPECIFIEDUNSPECIFIED
Daugas, J MUNSPECIFIEDUNSPECIFIED
Lewitowicz, MUNSPECIFIEDUNSPECIFIED
Balabanski, D LUNSPECIFIEDUNSPECIFIED
Becker, FUNSPECIFIEDUNSPECIFIED
Belier, GUNSPECIFIEDUNSPECIFIED
Bingham, CUNSPECIFIEDUNSPECIFIED
Borcea, CUNSPECIFIEDUNSPECIFIED
Bouchez, EUNSPECIFIEDUNSPECIFIED
Buta, AUNSPECIFIEDUNSPECIFIED
La Commara, MUNSPECIFIEDUNSPECIFIED
Dragulescu, EUNSPECIFIEDUNSPECIFIED
de France, GUNSPECIFIEDUNSPECIFIED
Georgiev, GUNSPECIFIEDUNSPECIFIED
Giovinazzo, JUNSPECIFIEDUNSPECIFIED
Gorska, MUNSPECIFIEDUNSPECIFIED
Hammache, FUNSPECIFIEDUNSPECIFIED
Hass, MUNSPECIFIEDUNSPECIFIED
Hellstrom, MUNSPECIFIEDUNSPECIFIED
Ibrahim, FUNSPECIFIEDUNSPECIFIED
Janas, ZUNSPECIFIEDUNSPECIFIED
Mach, HUNSPECIFIEDUNSPECIFIED
Mayet, PUNSPECIFIEDUNSPECIFIED
Meot, VUNSPECIFIEDUNSPECIFIED
Negoita, FUNSPECIFIEDUNSPECIFIED
Neyens, GUNSPECIFIEDUNSPECIFIED
Santos, F DUNSPECIFIEDUNSPECIFIED
Page, R DUNSPECIFIEDUNSPECIFIED
Perru, OUNSPECIFIEDUNSPECIFIED
Podolyak, Zz.podolyak@surrey.ac.ukUNSPECIFIED
Roig, OUNSPECIFIEDUNSPECIFIED
Rykaczewski, K PUNSPECIFIEDUNSPECIFIED
Saint-Laurent, M GUNSPECIFIEDUNSPECIFIED
Sauvestre, J EUNSPECIFIEDUNSPECIFIED
Sorlin, OUNSPECIFIEDUNSPECIFIED
Stanoiu, MUNSPECIFIEDUNSPECIFIED
Stefan, IUNSPECIFIEDUNSPECIFIED
Stodel, CUNSPECIFIEDUNSPECIFIED
Theisen, CUNSPECIFIEDUNSPECIFIED
Verney, DUNSPECIFIEDUNSPECIFIED
Zylicz, JUNSPECIFIEDUNSPECIFIED
Date : 1 January 2003
Identification Number : 10.1103/PhysRevC.68.044304
Additional Information : Published in <i>Physical Review C,</i> Vol. 68, Iss. 4. Copyright 2003 American Physical Society. Click <a href=http://prc.aps.org/>here</a> to access the journal's website.
Depositing User : Mr Adam Field
Date Deposited : 27 May 2010 14:07
Last Modified : 23 Sep 2013 18:27
URI: http://epubs.surrey.ac.uk/id/eprint/300

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