Beta asymmetry of the first forbidden 1/2[sup +][r arrow]1/2[sup [minus]] transition in [sup 19]Ne and its relationship to the parity nonconserving nucleon-nucleon interaction

Journal Article · Wed Dec 01 04:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.48.3069· OSTI ID:5800667

Saettler, E R.J.; Calaprice, F P; Hallin, A L; Lowry, M M ^[1]

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1. Joseph Henry Laboratories, Princeton University, Princeton, New Jersey 08544 (United States)

We report a measurement of the [beta] asymmetry of the first-forbidden transition from the 1/2[sup +] ground state of [sup 19]Ne to the 1/2[sup [minus]] level at 110 keV in [sup 19]F. Using atomic beam methods to prepare a 100% polarized source of [sup 19]Ne, we identify the 1/2[sup +][r arrow]1/2[sup [minus]] decays by the detection of the subsequent 110 keV gamma emitted in coincidence with a beta. The average [beta] asymmetry of the first-forbidden transition is measured to be [l angle][ital A][r angle]=17[plus minus]12 %. We simultaneously make an improved measurement of the branching ratio of the same transition and find [Gamma]=(1.13[plus minus]0.09)[times]10[sup [minus]4] in good agreement with previous results. Our measurement is used to obtain an improved calibration of the isovector parity-mixing matrix element between the 1/2[sup +] ground state of [sup 19]F and the 1/2[sup [minus]] level at 110 keV.

• OSTI ID: 5800667
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 48:6; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

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NUCLEAR DECAY
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NUCLEON-NUCLEON INTERACTIONS
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