Elsevier

Nuclear Physics A

Volume 112, Issue 2, 10 May 1968, Pages 372-384
Nuclear Physics A

Beta- and gamma-ray measurements on the decay of 38Cl

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Abstract

The decay of 37 min 38Cl has been reinvestigated with improved methods and accuracy. It was shown that the β-ray transition to the ground state of 38Ar has a unique shape. This confirms the theoretical predictions that the ground state of 38Cl is 2 and removes a contradiction arising from earlier measurements. After correction for the unique shape, the residual shape factor 1 + aW is found to be close to one: a = −0.005±0.004. This result must be compared with other measurements of unique transitions, which often give more pronounced negative values for a. The observed end-point energy is Emax(β0) = 4913±5 keV. A comparative shape measurement with 42K yielded: a = −0.005±0.003, Emax(β0) = 3519±4 keV.

The energies of the three known γ-ray transitions were measured with a 20 cm3 Ge(Li) detector; γ1: 1642.16±0.13 keV (73.8±0.9); γ2: 2167.60±0.16 keV (100) and γ3: 3810±2 keV (0.061±0.005), with relative intensities given in parentheses.

In an appendix the assignment 12 to 95Y resulting from the use of 38Cl for calibration is mentioned.

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  • Cited by (0)

    Present address: Reactor Centrum Nederland, Petten.

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