Laser trapped 6He as a probe of the weak interaction and a test of the sudden approximation

29th International Conference on Photonic, Electronic, and Atomic Collisions

Leredde, A.^1 ; Bagdasarova, Y.^2 ; Bailey, K.^1 ; Fléchard, X.^3 ; Knecht, A.^5 ; Garcia, A.^2 ; Hong, R.^2 ; Liénard, E.^3 ; Müller, P.^1 ; Naviliat-Cuncic, O.^4 ; O'Connor, T.P.^1 ; Sternberg, M.^2 ; Storm, D.^2 ; Swanson, E.^2 ; Wauters, F.^2 ; Zumwalt, D.^2

Physics Division, Argonne National Lab., Lemont

IL

60439, United States^1

University of Washington, Seattle

WA

98195, United States^2

LPC-Caen, IN2P3, ENSICAEN, Université de Caen Basse-Normandie, Caen, Cedex

14050, France^3

Michigan State University, East Lansing

MI

48824, United States^4

Paul Scherrer Institute, Viligent

5232, Switzerland^5

关键词: Angular correlations;    Atomic calculations;    Few-electron systems;    Magnetooptical traps;    Radioactive atoms;    Sudden approximation;    The standard model;    Weak interactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/5/052066/pdf
DOI  :  10.1088/1742-6596/635/5/052066

来源: IOP

【 摘 要 】

Correlations between β decay products are sensitive observables to look for exotic contributions to the weak interaction excluded by the Standard Model of particle physics. To precisely measure the β - v angular correlation parameter, αβν, in6He β decay, the radioactive atoms are trapped in a magneto-optical trap and the momentum of β particles and6Li recoil ions are measured in coincidence. The shake-off process, leading to higher charge states of the Li, plays an important role in this observation and must be studied carefully. Its study provides stringent tests of the sudden approximation for atomic calculations in this few electron system.