Beta-neutrino correlation experiments on laser trapped 38mK, 37K

被引：28

作者：

Gorelov, A

Behr, JA

Melconian, D

Trinczek, M

Dubé, P

Häusser, O

Giesen, U

Jackson, KP

Swanson, T

D'Auria, JM

Dombsky, M

Ball, G

Buchmann, L

Jennings, B

Dilling, J

Schmid, J

Ashery, D

Deutsch, J

Alford, WP

Asgeirsson, D

Wong, W

Lee, B

机构：

[1] TRIUMF, Vancouver, BC V6T 2A3, Canada

[2] Simon Fraser Univ, Dept Phys, Burnaby, BC V5A 1S6, Canada

[3] Simon Fraser Univ, Dept Chem, Burnaby, BC V5A 1S6, Canada

[4] Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany

[5] Tel Aviv Univ, IL-69978 Tel Aviv, Israel

[6] Univ Catholique Louvain, B-1348 Louvain, Belgium

[7] Univ Western Ontario, London, ON, Canada

[8] Univ British Columbia, Vancouver, BC V5Z 1M9, Canada

[9] Univ Victoria, Victoria, BC, Canada

来源：

HYPERFINE INTERACTIONS | 2000年 / 127卷 / 1-4期

关键词：

beta decay; neutral atom trap; shakeoff electron; charge state;

D O I：

10.1023/A:1012649229978

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Laser trapping and cooling techniques are now being applied to the study of nuclear beta-decay at several labs. A magneto-optical trap (MOT) provides a localized source of atoms suspended in space, so the low-energy recoiling nuclei can freely escape and be detected in coincidence with the beta. This allows reconstruction of the neutrino momentum, and the deduction of the beta-nu correlation in a more direct fashion than previously possible. In addition, the nuclei can be polarized by atomic techniques, opening a new class of spin-correlation measurements to test the degree to which parity is maximally violated in the weak interaction. Our present experiment has detected several hundred thousand recoil-beta(+) coincidences from the 0(+) --> 0(+) pure Fermi decay of K-38m, produced at the on-line isotope separators TISOL and ISAC at TRIUMF. Our goal is to set constraints on non-Standard Model scalar bosons competitive with high-energy colliders and more conventional beta-nu correlation experiments.

引用

页码：373 / 380

页数：8

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