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Title: Subbarrier fusion of {sup 9}Li with {sup 70}Zn

Abstract

The cross section for the fusion of {sup 9}Li with {sup 70}Zn was measured for seven projectile energies spanning the subbarrier and near-barrier region (E{sub c.m.} ranging from 9.7 to 13.4 MeV) using the ISAC facility at TRIUMF. {gamma}-ray spectroscopy of the irradiated target foils along with {beta} counting of the chemically separated Ge and As evaporation residues were used to measure the fusion cross sections. Statistical model calculations were used to correct for the yields of any unobserved nuclei. The observed fusion excitation function shows significant subbarrier fusion enhancement with a large deduced value of the fusion radius, R{sub B}=12.1{+-}1.0 fm. Coupled-channels calculations do not account for the observed subbarrier enhancement. The implications of this finding for understanding the fusion of {sup 11}Li are discussed.

Authors:
; ; ; ; ;  [1]; ; ; ;  [2];  [2];  [3]; ;  [2];  [3]
  1. Department of Chemistry, Oregon State University, Corvallis, Oregon 97331 (United States)
  2. TRIUMF, Vancouver, British Columbia, V6T 2A3 (Canada)
  3. (Canada)
Publication Date:
OSTI Identifier:
20864214
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 74; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevC.74.064609; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; COUPLED CHANNEL THEORY; EXCITATION FUNCTIONS; GAMMA SPECTROSCOPY; HEAVY ION FUSION REACTIONS; LITHIUM 11; LITHIUM 9; MEV RANGE; NUCLEAR REACTION YIELD; STATISTICAL MODELS; ZINC 70

Citation Formats

Loveland, W., Vinodkumar, A. M., Naik, R. S., Sprunger, P. H., Matteson, B., Neeway, J., Trinczek, M., Dombsky, M., Machule, P., Ottewell, D., Cross, D., Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Gagnon, K., Mills, W. J., and Department of Physics, Simon Fraser University, Burnaby, British Columbia, V5A 1S6. Subbarrier fusion of {sup 9}Li with {sup 70}Zn. United States: N. p., 2006. Web. doi:10.1103/PHYSREVC.74.064609.
Loveland, W., Vinodkumar, A. M., Naik, R. S., Sprunger, P. H., Matteson, B., Neeway, J., Trinczek, M., Dombsky, M., Machule, P., Ottewell, D., Cross, D., Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Gagnon, K., Mills, W. J., & Department of Physics, Simon Fraser University, Burnaby, British Columbia, V5A 1S6. Subbarrier fusion of {sup 9}Li with {sup 70}Zn. United States. doi:10.1103/PHYSREVC.74.064609.
Loveland, W., Vinodkumar, A. M., Naik, R. S., Sprunger, P. H., Matteson, B., Neeway, J., Trinczek, M., Dombsky, M., Machule, P., Ottewell, D., Cross, D., Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Gagnon, K., Mills, W. J., and Department of Physics, Simon Fraser University, Burnaby, British Columbia, V5A 1S6. Fri . "Subbarrier fusion of {sup 9}Li with {sup 70}Zn". United States. doi:10.1103/PHYSREVC.74.064609.
@article{osti_20864214,
title = {Subbarrier fusion of {sup 9}Li with {sup 70}Zn},
author = {Loveland, W. and Vinodkumar, A. M. and Naik, R. S. and Sprunger, P. H. and Matteson, B. and Neeway, J. and Trinczek, M. and Dombsky, M. and Machule, P. and Ottewell, D. and Cross, D. and Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6 and Gagnon, K. and Mills, W. J. and Department of Physics, Simon Fraser University, Burnaby, British Columbia, V5A 1S6},
abstractNote = {The cross section for the fusion of {sup 9}Li with {sup 70}Zn was measured for seven projectile energies spanning the subbarrier and near-barrier region (E{sub c.m.} ranging from 9.7 to 13.4 MeV) using the ISAC facility at TRIUMF. {gamma}-ray spectroscopy of the irradiated target foils along with {beta} counting of the chemically separated Ge and As evaporation residues were used to measure the fusion cross sections. Statistical model calculations were used to correct for the yields of any unobserved nuclei. The observed fusion excitation function shows significant subbarrier fusion enhancement with a large deduced value of the fusion radius, R{sub B}=12.1{+-}1.0 fm. Coupled-channels calculations do not account for the observed subbarrier enhancement. The implications of this finding for understanding the fusion of {sup 11}Li are discussed.},
doi = {10.1103/PHYSREVC.74.064609},
journal = {Physical Review. C, Nuclear Physics},
number = 6,
volume = 74,
place = {United States},
year = {Fri Dec 15 00:00:00 EST 2006},
month = {Fri Dec 15 00:00:00 EST 2006}
}