Double gamma decay in Ca40 and Zr90

J. Schirmer; D. Habs; R. Kroth; N. Kwong; D. Schwalm; M. Zirnbauer; C. Broude

doi:10.1103/PhysRevLett.53.1897

Double gamma decay in Ca40 and Zr90

J. Schirmer
, D. Habs
, R. Kroth
, N. Kwong
, D. Schwalm
, M. Zirnbauer
, C. Broude

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

The rare double gamma decay of the first excited 0+ state in Ca40 and Zr90 has been measured with a segmented 4π NaI detector system, which allows suppression of the perturbing background due to positron annihilation in flight. In both cases the directional correlation of the two photons is found to be asymmetric around 90°, which is explained by an interference of 2E1 and 2M1 transitions. The deduced M1 quenching factors agree with those from (e,e′) and (p,p′) measurements.

Original language	English (US)
Pages (from-to)	1897-1900
Number of pages	4
Journal	Physical review letters
Volume	53
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.53.1897
State	Published - 1984
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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10.1103/PhysRevLett.53.1897

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abstract = "The rare double gamma decay of the first excited 0+ state in Ca40 and Zr90 has been measured with a segmented 4π NaI detector system, which allows suppression of the perturbing background due to positron annihilation in flight. In both cases the directional correlation of the two photons is found to be asymmetric around 90°, which is explained by an interference of 2E1 and 2M1 transitions. The deduced M1 quenching factors agree with those from (e,e′) and (p,p′) measurements.",

author = "J. Schirmer and D. Habs and R. Kroth and N. Kwong and D. Schwalm and M. Zirnbauer and C. Broude",

year = "1984",

doi = "10.1103/PhysRevLett.53.1897",

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T1 - Double gamma decay in Ca40 and Zr90

AU - Schirmer, J.

AU - Habs, D.

AU - Kroth, R.

AU - Kwong, N.

AU - Schwalm, D.

AU - Zirnbauer, M.

AU - Broude, C.

PY - 1984

Y1 - 1984

N2 - The rare double gamma decay of the first excited 0+ state in Ca40 and Zr90 has been measured with a segmented 4π NaI detector system, which allows suppression of the perturbing background due to positron annihilation in flight. In both cases the directional correlation of the two photons is found to be asymmetric around 90°, which is explained by an interference of 2E1 and 2M1 transitions. The deduced M1 quenching factors agree with those from (e,e′) and (p,p′) measurements.

AB - The rare double gamma decay of the first excited 0+ state in Ca40 and Zr90 has been measured with a segmented 4π NaI detector system, which allows suppression of the perturbing background due to positron annihilation in flight. In both cases the directional correlation of the two photons is found to be asymmetric around 90°, which is explained by an interference of 2E1 and 2M1 transitions. The deduced M1 quenching factors agree with those from (e,e′) and (p,p′) measurements.

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UR - https://www.scopus.com/pages/publications/4043078623#tab=citedBy

U2 - 10.1103/PhysRevLett.53.1897

DO - 10.1103/PhysRevLett.53.1897

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JO - Physical review letters

JF - Physical review letters

IS - 20

ER -

Double gamma decay in Ca40 and Zr90

Abstract

ASJC Scopus subject areas

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