Isotopic yields of neutron-rich nuclei from deep-inelastic reactions

Journal Article · Sat Jan 01 04:00:00 EST 2000 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.61.014602· OSTI ID:20215143

Asztalos, S J ^[1]; Lee, I Y ^[1]; Vetter, K ^[1]; Cederwall, B ^[1]; Clark, R M ^[1]; Deleplanque, M A ^[1]; Diamond, R M ^[1]; Fallon, P ^[1]; Jing, K ^[1]; Phair, L ^[1]

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1. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

We follow up on our earlier work involving a light projectile ({sup 48}Ca) to populate high spin states in neutron-rich nuclei with results from experiments involving a heavier projectile ({sup 154}Sm) for the purposes of studying isotopic yields. These yields, which in some cases were measurable down to a level of 0.1% of the total reaction cross section, are presented from three separate reactions. A trend in the isotopic yields towards N/Z equilibration is observed in one experiment having a large disparity in N/Z ratios between the projectile and target. In the two other reactions, where the N/Z driving force is less pronounced, the yields are instead clustered around the projectile and target nuclei. We present correlated projectilelike and targetlike fragment isotopic yields derived from {gamma}-{gamma} coincidences, a technique that enables one to partition the yield of an isotope according to the amount of neutron evaporation. Using this method we find that for the zero-neutron evaporation channel transfer occurs predominantly into the light fragment, consistent with the nature of the deep-inelastic mechanism. We further find that multiple-neutron evaporation contributes substantially to the yields of the isotopes. (c) 1999 The American Physical Society.

• OSTI ID: 20215143
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 61; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CALCIUM 48 BEAMS
DEEP INELASTIC HEAVY ION REACTIONS
EXPERIMENTAL DATA
HIGH SPIN STATES
NUCLEAR FRAGMENTS
SAMARIUM 154