| Autor: |
Sayre DB; Ohio University, Athens, Ohio 45701, USA. sayre4@llnl.gov, Brune CR, Carter DE, Jacobs DK, Massey TN, O'Donnell JE |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2012 Oct 05; Vol. 109 (14), pp. 142501. Date of Electronic Publication: 2012 Oct 03. |
| DOI: |
10.1103/PhysRevLett.109.142501 |
| Abstrakt: |
The E1-E2 interference sign between the E(c.m.)=2.68-MeV E2 resonance and an underlying E1 strength has been measured for the first time. An E1-E2 asymmetry parameter of a=0.07±0.05 was extracted from the thick-target γ-ray yields of the narrow resonance at angles of 45° and 135°. The positive sign of a corresponded to constructive interference at forward angles and, further, allowed the interference between the resonance and an E2 background to be identified as constructive below the resonance energy. The E2-E2 interference was then used to evaluate the global S(E2) data within the vicinity of the resonance 2.5≤E(c.m.)≤3.0 MeV. An analysis of the global S(E2) data that agreed with the interference scenario has determined the E2-E2 interference scheme of the 4.34-MeV resonance and background, resulting in a value of S(E2)(300)=62(-6)(+9) keV b. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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