Resonant alpha capture by /sup 7/Be and /sup 7/Li

Journal Article · Sat Mar 31 23:00:00 EST 1984 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.29.1199· OSTI ID:7048896

Hardie, G; Filippone, B W; Elwyn, A J; Wiescher, M; Segel, R E

Resonances at E/sub ..cap alpha../ = 401, 814, and 953 keV were observed in the /sup 7/Li(..cap alpha..,..gamma..) reaction. From the thick target yields the corresponding states in /sup 11/B at 8920, 9185, and 9274 keV were found to have center-of-mass resonance strengths of 0.0088 +- 0.0014, 0.317 +- 0.047, and 1.72 +- 0.17 eV, respectively. The radiative widths deduced for the latter two states are 0.17/sub -0.03//sup +0.06/ and 1.15 +- 0.16 eV, respectively. Using a 40 mCi /sup 7/Be target, ..cap alpha..-capture resonances were observed at E/sub ..cap alpha../ = 884 (/sup 11/C( = 8105 keV) and 1376 (/sup 11/C( = 8421 keV) keV with center-of-mass resonance strengths of 0.331 +- 0.041 and 3.80 +- 0.57 eV, respectively. The radiative widths deduced for these states are 0.350 +- 0.056 and 3.1 +- 1.3 eV, respectively. The observed decay rates are compared with theoretical calculations.

• Research Organization: Physics Department, Western Michigan University, Kalamazoo, Michigan 49008
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 7048896
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 29:4; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
BERYLLIUM 7 TARGET
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BORON 11
BORON ISOTOPES
CAPTURE
CARBON 11
CARBON ISOTOPES
CHARGED-PARTICLE REACTIONS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY RANGE
EVEN-ODD NUCLEI
GAMMA RADIATION
IONIZING RADIATIONS
ISOTOPES
KEV RANGE
KEV RANGE 100-1000
LIGHT NUCLEI
LITHIUM 7 TARGET
MINUTES LIVING RADIOISOTOPES
MIRROR NUCLEI
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
RADIATIONS
RADIOISOTOPES
RESONANCE
STABLE ISOTOPES
TARGETS