Population of high-spin isomeric states following fragmentation of U-238

M. Bowry; Zs Podolyak; S. Pietri; J. Kurcewicz; M. Bunce; P. H. Regan; F. Farinon; H. Geissel; C. Nociforo; A. Prochazka; H. Weick; N. Al-Dahan; N. Alkhomashi; P. R. P. Allegro; J. Benlliure; G. Benzoni; P. Boutachkov; A. M. Bruce; A. M. Denis Bacelar; G. F. Farrelly; J. Gerl; M. Gorska; A. Gottardo; J. Grebosz; N. Gregor; R. Janik; R. Knoebel; I. Kojouharov; T. Kubo; N. Kurz; Yu. A. Litvinov; E. Merchan; I. Mukha; F. Naqvi; B. Pfeiffer; M. Pfuetzner; W. Plass; M. Pomorski; B. Riese; M. V. Ricciardi; K. -H. Schmidt; H. Schaffner; C. Scheidenberger; E. C. Simpson; B. Sitar; P. Spiller; J. Stadlmann; P. Strmen; B. Sun; I. Tanihata; S. Terashima; J. J. Valiente Dobon; J. S. Winfield; H. -J. Wollersheim; P. J. Woods

doi:10.1103/PhysRevC.88.024611

Journal article

Population of high-spin isomeric states following fragmentation of U-238

M. Bowry, Zs Podolyak, S. Pietri, J. Kurcewicz, M. Bunce, P. H. Regan, F. Farinon, H. Geissel, C. Nociforo, A. Prochazka, …

Physical review. C, Nuclear physics, Vol.88(2)

16/08/2013

DOI: https://doi.org/10.1103/PhysRevC.88.024611

Abstract

Physical Sciences

Physics

Physics, Nuclear

Science & Technology

Isomeric ratios have been determined for 23 metastable states identified in A approximate to 200 nuclei from Pt to Rn near the valley of stability following fragmentation of U-238. This includes high-spin states with angular momenta ranging from (39/2)(h) over bar to 25 (h) over bar. The experimental results are discussed together with those of similar experiments performed in this mass region. Isomeric ratios are compared with theoretical predictions where the angular momentum of the fragment arises purely due to the angular momentum of nucleons removed from the projectile. The theoretical yield of low-spin states is generally overestimated. In these cases the assumption of 100% feeding of the isomer may require modification. However, the yield of high-spin isomeric states [I-m >= (39/2)(h) over bar] is significantly underestimated and highlights the requirement for a more complete theoretical framework in relation to the generation of fragment angular momentum. The enhanced population of high-spin states reported here is advantageous to future studies involving isomeric beams at fragmentation facilities such as the Rikagaku Kenkyusho RI Beam Factory (Japan) and next-generation facilities at the Facility for Antiproton and Ion Research (Germany) and Facility for Rare Isotope Beams (USA).

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Title: Population of high-spin isomeric states following fragmentation of U-238
Creators - without role: M. Bowry - University of Surrey
Zs Podolyak - University of Surrey
S. Pietri - GSI Darmstadt, D-64291 Darmstadt, Germany
J. Kurcewicz - GSI Darmstadt, D-64291 Darmstadt, Germany
M. Bunce - University of Surrey
P. H. Regan - University of Surrey
F. Farinon - GSI Darmstadt, D-64291 Darmstadt, Germany
H. Geissel - GSI Darmstadt, D-64291 Darmstadt, Germany
C. Nociforo - GSI Darmstadt, D-64291 Darmstadt, Germany
A. Prochazka - GSI Darmstadt, D-64291 Darmstadt, Germany
H. Weick - GSI Darmstadt, D-64291 Darmstadt, Germany
N. Al-Dahan - University of Surrey
N. Alkhomashi - University of Surrey
P. R. P. Allegro - Univ Sao Paulo, BR-05508900 Sao Paulo, Brazil
J. Benlliure - Universidade de Santiago de Compostela
G. Benzoni - Mylan
P. Boutachkov - GSI Darmstadt, D-64291 Darmstadt, Germany
A. M. Bruce - University of Brighton
A. M. Denis Bacelar - University of Brighton
G. F. Farrelly - University of Surrey
J. Gerl - GSI Darmstadt, D-64291 Darmstadt, Germany
M. Gorska - GSI Darmstadt, D-64291 Darmstadt, Germany
A. Gottardo - Ist Nazl Fis Nucl, Lab Nazl Legnaro, Padua, Italy
J. Grebosz - Henryk Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland
N. Gregor - GSI Darmstadt, D-64291 Darmstadt, Germany
R. Janik - Comenius Univ, Dept Nucl Phys & Biophys, Bratislava 84248, Slovakia
R. Knoebel - GSI Darmstadt, D-64291 Darmstadt, Germany
I. Kojouharov - GSI Darmstadt, D-64291 Darmstadt, Germany
T. Kubo - RIKEN
N. Kurz - GSI Darmstadt, D-64291 Darmstadt, Germany
Yu. A. Litvinov - GSI Darmstadt, D-64291 Darmstadt, Germany
E. Merchan - GSI Darmstadt, D-64291 Darmstadt, Germany
I. Mukha - GSI Darmstadt, D-64291 Darmstadt, Germany
F. Naqvi - Yale University
B. Pfeiffer - GSI Darmstadt, D-64291 Darmstadt, Germany
M. Pfuetzner - University of Warsaw
W. Plass - University of Giessen
M. Pomorski - University of Warsaw
B. Riese - GSI Darmstadt, D-64291 Darmstadt, Germany
M. V. Ricciardi - GSI Darmstadt, D-64291 Darmstadt, Germany
K. -H. Schmidt - GSI Darmstadt, D-64291 Darmstadt, Germany
H. Schaffner - GSI Darmstadt, D-64291 Darmstadt, Germany
C. Scheidenberger - GSI Darmstadt, D-64291 Darmstadt, Germany
E. C. Simpson - University of Surrey
B. Sitar - Comenius Univ, Dept Nucl Phys & Biophys, Bratislava 84248, Slovakia
P. Spiller - GSI Darmstadt, D-64291 Darmstadt, Germany
J. Stadlmann - GSI Darmstadt, D-64291 Darmstadt, Germany
P. Strmen - Comenius Univ, Dept Nucl Phys & Biophys, Bratislava 84248, Slovakia
B. Sun - GSI Darmstadt, D-64291 Darmstadt, Germany
I. Tanihata - Nucl Phys Res Ctr, Ibaraki, Osaka 5670047, Japan
S. Terashima - Beihang University
J. J. Valiente Dobon - Ist Nazl Fis Nucl, Lab Nazl Legnaro, Padua, Italy
J. S. Winfield - GSI Darmstadt, D-64291 Darmstadt, Germany
H. -J. Wollersheim - GSI Darmstadt, D-64291 Darmstadt, Germany
P. J. Woods - University of Edinburgh
Publication Details: Physical review. C, Nuclear physics, Vol.88(2)
Publisher: Amer Physical Soc
Number of pages: 11
Grant note: EP/D003628/1 / Science and Technology Facilities Council; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) 11035007; 11105010 / NSFC; National Natural Science Foundation of China (NSFC) UK Science and Technologies Facilities Council (STFC); UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC) NCET-09-0031 / NCET; Program for New Century Excellent Talents in University (NCET) EP/D003628/1 / STFC; UK Research & Innovation (UKRI); Science & Technology Facilities Council (STFC)
Identifiers: 9918774008331
Academic Unit: King Abdulaziz City for Science & Technology
Language: English
Resource Type: Journal article