Isomeric states in neutron-deficient A{approx}80-90 nuclei populated in the fragmentation of {sup 107}Ag

The relativistic projectile fragmentation of a 750 MeV per nucleon beam of {sup 107}Ag was used to populate isomeric states in neutron-deficient nuclei around A=80-90. Reaction products were separated and unambiguously identified using the GSI FRagment Separator (FRS) and its ancillary detectors. At...

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Bibliographic Details
Published in:Physical review. C, Nuclear physics Nuclear physics, 2009-12, Vol.80 (6)
Main Authors: Garnsworthy, A. B., WNSL, Yale University, New Haven, Connecticut 06520, Regan, P. H., Pietri, S., Podolyak, Zs, Steer, S. J., Brandau, C., Catford, W. N., Cullen, I. J., Gelletly, W., Jones, G. A., Liu, Z., Walker, P. M., Sun, Y., Xu, F. R., Rudolph, D., Gorska, M., Becker, F., Doornenbal, P., Geissel, H., Gerl, J.
Format: Article
Language:English
Subjects:
ALUMINIUM
EFFICIENCY
EXCITED STATES
FRAGMENTATION
GERMANIUM
ISOMERS
MEV RANGE 100-1000
NEUTRON-DEFICIENT ISOTOPES
NEUTRONS
NIOBIUM 82
NIOBIUM 84
NUCLEAR PHYSICS AND RADIATION PHYSICS
NUCLEON BEAMS
PROJECTILES
RELATIVISTIC RANGE
SILVER 107
TECHNETIUM 86
TECHNETIUM 87
TECHNETIUM 88
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Summary:The relativistic projectile fragmentation of a 750 MeV per nucleon beam of {sup 107}Ag was used to populate isomeric states in neutron-deficient nuclei around A=80-90. Reaction products were separated and unambiguously identified using the GSI FRagment Separator (FRS) and its ancillary detectors. At the final focal plane, the fragments were slowed from relativistic energies by means of an aluminium degrader and implanted in a passive stopper in the center of the high-efficiency, high-granularity Stopped Rare Isotope Spectroscopic INvestigation at GSI (RISING) germanium array. This allowed the identification of excited states in the N=Z nuclei {sub 43}{sup 86}Tc and, for the first time, {sub 41}{sup 82}Nb. Isomeric states have also been identified for the first time in {sup 87,88}Tc, and a previously unreported isomer was observed in {sup 84}Nb. Experimental results are presented along with a discussion on the structure of these nuclei based on interpretations provided by several theoretical models.
ISSN:0556-2813
1089-490X
DOI:10.1103/PHYSREVC.80.064303