Spectroscopy of {sup 7}He states using the ({sup 15}N,{sup 17}F) reaction on {sup 9}Be
Journal Article
·
· Physical Review C
We have studied states of {sup 7}He using the {sup 9}Be({sup 15}N,{sup 17}F){sup 7}He reaction at two incident energies, E{sub lab}=240 MeV and 318.5 MeV and observed clearly the first excited state of {sup 7}He. An extended study of the three-body background was required to determine the excitation energy and width. The resonance parameters obtained for l=1 are E{sub x}=2.95(10) MeV, and {Gamma}=1.9(3) MeV. There is also evidence of a broad excited state at E{sub x}=5.8(3) MeV with {Gamma}=4(1) MeV. From the analysis of the {sup 7}He ground state resonance, we extracted a value of 0.14(2) MeV for the width. In the calibration reaction {sup 12}C({sup 15}N,{sup 17}F){sup 10}Be three high-lying states of {sup 10}Be are found at 13.6(1), 15.3(2), and 16.9(2) MeV.
- Sponsoring Organization:
- (US)
- DOE Contract Number:
- FG02-88ER40387
- OSTI ID:
- 40276984
- Journal Information:
- Physical Review C, Journal Name: Physical Review C Journal Issue: 2 Vol. 64; ISSN 0556-2813
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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