2021 Impact factor 3.131
Hadrons and Nuclei
Eur. Phys. J. A 6, 361-366

Testing the Pauli exclusion principle with the NEMO-2 detector

R. Arnold11 - C. Augier9 - J. Baker5 - A. Barabash8 - D. Blum9 - V. Brudanin3 - A.J. Caffrey5 - J.E. Campagne9 - E. Caurier11 - D. Dassié1 - V. Egorov3 - T. Filipova3 - R. Gurriaran1 - J.L. Guyonnet11 - F. Hubert1 - Ph. Hubert1 - S. Jullian9 - O. Kochetov3 - I. Kisel3 - V.N. Kornoukhov8 - V. Kovalenko3 - D. Lalanne9 - F. Laplanche9 - F. Leccia1 - I. Linck11 - C. Longuemare2 - Ch. Marquet1 - F. Mauger2 - H.W. Nicholson10 - I. Pilugin8 - F. Piquemal1 - J-L. Reyss4 - X. Sarazin9 - F. Scheibling11 - J. Suhonen6 - C.S. Sutton10 - G. Szklarz9 - V. Timkin3 - R. Torres1 - V.I. Tretyak7 - V. Umatov8 - I. Vanyushin8 - A. Vareille1 - Yu. Vasilyev7 - Ts. Vylov3

1 CENBG, IN2P3-CNRS et Université de Bordeaux, 33170 Gradignan, France
2 LPC, IN2P3-CNRS et Université de Caen, 14032 Caen, France
3 JINR, 141980 Dubna, Russia
4 CFR, CNRS, 91190 Gif sur Yvette, France
5 INEEL, Idaho Falls, ID 83415, USA
6 JYVÄSKYLÄ University, 40351 Jyväskylä, Finland
7 INR, 252028 Kiev, Ukraine
8 ITEP,117259 Moscow, Russia
9 LAL, IN2P3-CNRS et Université Paris-Sud, 91405 Orsay, France
10 MHC, South Hadley, Massachusetts 01075, USA
11 IN2P3-CNRS et Université Louis Pasteur, 67037 Strasbourg, France

Received: 25 August 1999 Communicated by B. Povh

Abstract
The Pauli Exclusion Principle (PEP) was tested with the NEMO-2 detector. Limits at the 90% C.L. on the violation of PEP for p-shell nucleons in 12C were obtained. Specifically, transitions to the fully occupied 1s1/2-shell yielded a limit of $4.2\cdot 10^{24}$ y for the process with emission of a $\gamma$-quantum. Similarly limits of $3.1\cdot 10^{24}$ y for $\beta^-$ and $2.6\cdot 10^{24}$ y for $\beta
^{+}$ Pauli-forbidden transitions of 12 $\rightarrow ^{12}\tilde{\mathrm
N}(^{12}\tilde{\mathrm B})$ are reported here.

PACS
23.90.+w Other topics in radioactive decay and in-beam spectroscopy - 11.30.Ly Other internal and higher symmetries


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