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The population of metastable states as a probe of relativistic-energy fragmentation reactions

Denis Bacelar, AM, Bruce, AM, Podolyák, Z, Al-Dahan, N, Alkhomashi, N, Cullen, IJ, Deo, AY, Farrelly, GF, Gelletly, W, Regan, PH, Steer, SJ, Swan, TPD, Walker, PM, Górska, M, Pietri, S, Ricciardi, MV, Boutachkov, P, Domingo-Pardo, C, Farinon, F, Geissel, H, Gerl, J, Goel, N, Grȩbosz, J, Hoischen, R, Kojouharov, I, Kurz, N, Nociforo, C, Prochazka, A, Prokopowicz, W, Schmidt, K-H, Schaffner, H, Weick, H, Wollersheim, HJ, Detistov, P, Algora, A, Molina, F, Rubio, B, Dombradi, Z, Benlliure, J, Morales, AI, Verma, S, Bracco, A, Leoni, S, Montanari, D, Nicolini, R, Calore, E, Napoli, DR, Valiente-Dobón, JJ, Casarejos, E, Doncel, M, Rudolph, D, Musumarra, A, Steiger, K, Strmen, P, Szarka, I and Lalkovski, S (2013) The population of metastable states as a probe of relativistic-energy fragmentation reactions Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics.

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Abstract

Isomeric ratios have been measured for high-spin states in Po, At, Rn, Fr, Ra, and Ac following the projectile fragmentation of a 1 A GeV U beam by a Be target at GSI Helmholtzzentrum für Schwerionenforschung. The fragments were separated in the fragment separator (FRS) and identified by means of energy loss and time-of-flight techniques. They were brought to rest at the centre of the RISING gamma-ray detector array and intensities of gamma rays emitted in the decay of isomeric states with half-lives between 100 ns and 40 μs and spin values up to 55 / 2 ℏ were used to obtain the corresponding isomeric ratios. The data are compared to theoretical isomeric ratios calculated in the framework of the abrasion-ablation model. Large experimental enhancements are obtained for high-spin isomers in comparison to expected values. © 2013 Elsevier B.V. All rights reserved.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
AuthorsEmailORCID
Denis Bacelar, AMUNSPECIFIEDUNSPECIFIED
Bruce, AMUNSPECIFIEDUNSPECIFIED
Podolyák, ZUNSPECIFIEDUNSPECIFIED
Al-Dahan, NUNSPECIFIEDUNSPECIFIED
Alkhomashi, NUNSPECIFIEDUNSPECIFIED
Cullen, IJUNSPECIFIEDUNSPECIFIED
Deo, AYUNSPECIFIEDUNSPECIFIED
Farrelly, GFUNSPECIFIEDUNSPECIFIED
Gelletly, WUNSPECIFIEDUNSPECIFIED
Regan, PHUNSPECIFIEDUNSPECIFIED
Steer, SJUNSPECIFIEDUNSPECIFIED
Swan, TPDUNSPECIFIEDUNSPECIFIED
Walker, PMUNSPECIFIEDUNSPECIFIED
Górska, MUNSPECIFIEDUNSPECIFIED
Pietri, SUNSPECIFIEDUNSPECIFIED
Ricciardi, MVUNSPECIFIEDUNSPECIFIED
Boutachkov, PUNSPECIFIEDUNSPECIFIED
Domingo-Pardo, CUNSPECIFIEDUNSPECIFIED
Farinon, FUNSPECIFIEDUNSPECIFIED
Geissel, HUNSPECIFIEDUNSPECIFIED
Gerl, JUNSPECIFIEDUNSPECIFIED
Goel, NUNSPECIFIEDUNSPECIFIED
Grȩbosz, JUNSPECIFIEDUNSPECIFIED
Hoischen, RUNSPECIFIEDUNSPECIFIED
Kojouharov, IUNSPECIFIEDUNSPECIFIED
Kurz, NUNSPECIFIEDUNSPECIFIED
Nociforo, CUNSPECIFIEDUNSPECIFIED
Prochazka, AUNSPECIFIEDUNSPECIFIED
Prokopowicz, WUNSPECIFIEDUNSPECIFIED
Schmidt, K-HUNSPECIFIEDUNSPECIFIED
Schaffner, HUNSPECIFIEDUNSPECIFIED
Weick, HUNSPECIFIEDUNSPECIFIED
Wollersheim, HJUNSPECIFIEDUNSPECIFIED
Detistov, PUNSPECIFIEDUNSPECIFIED
Algora, AUNSPECIFIEDUNSPECIFIED
Molina, FUNSPECIFIEDUNSPECIFIED
Rubio, BUNSPECIFIEDUNSPECIFIED
Dombradi, ZUNSPECIFIEDUNSPECIFIED
Benlliure, JUNSPECIFIEDUNSPECIFIED
Morales, AIUNSPECIFIEDUNSPECIFIED
Verma, SUNSPECIFIEDUNSPECIFIED
Bracco, AUNSPECIFIEDUNSPECIFIED
Leoni, SUNSPECIFIEDUNSPECIFIED
Montanari, DUNSPECIFIEDUNSPECIFIED
Nicolini, RUNSPECIFIEDUNSPECIFIED
Calore, EUNSPECIFIEDUNSPECIFIED
Napoli, DRUNSPECIFIEDUNSPECIFIED
Valiente-Dobón, JJUNSPECIFIEDUNSPECIFIED
Casarejos, EUNSPECIFIEDUNSPECIFIED
Doncel, MUNSPECIFIEDUNSPECIFIED
Rudolph, DUNSPECIFIEDUNSPECIFIED
Musumarra, AUNSPECIFIEDUNSPECIFIED
Steiger, KUNSPECIFIEDUNSPECIFIED
Strmen, PUNSPECIFIEDUNSPECIFIED
Szarka, IUNSPECIFIEDUNSPECIFIED
Lalkovski, SUNSPECIFIEDUNSPECIFIED
Date : 2013
Identification Number : 10.1016/j.physletb.2013.05.033
Additional Information : NOTICE: this is the author’s version of a work that was accepted for publication in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 723(4-5), June 2013, DOI 10.1016/j.physletb.2013.05.033.
Depositing User : Symplectic Elements
Date Deposited : 04 Jul 2013 12:22
Last Modified : 23 Sep 2013 20:10
URI: http://epubs.surrey.ac.uk/id/eprint/780275

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