Search for the admixture of heavy neutrinos in the recoil spectra of {sup 37}Ar decay

Journal Article · Thu Oct 01 04:00:00 EDT 1998 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.58.2512· OSTI ID:664887

Hindi, M M; Kozub, R L; Miocinovic, P ^[1]; Avci, R; Zhu, L ^[2]; Hussein, A H ^[3]

---

1. Department of Physics, Tennessee Technological University, Cookeville, Tennessee 38505 (United States)
2. Department of Physics, Montana State University, Bozeman, Montana 59717 (United States)
3. Physics Program, University of Northern British Columbia, Prince George, British Columbia, V2N 4Z9 (CANADA)

Neutrino-induced recoil spectra of {sup 37}Cl ions produced in the electron capture (EC) decay of {sup 37}Ar were measured and searched for the presence of massive neutrinos admixed to the dominant electron neutrino. Fractions of a monolayer of {sup 37}Ar were physisorbed on Au and on several underlayers of {sup 40}Ar adsorbed on both Au and graphite substrates cooled to {le}20 K under ultrahigh vacuum conditions. Time-of-flight spectra of the recoiling ions were recorded in coincidence with x rays and Auger electrons emitted following the EC decay. By searching these spectra for peaks with energies between 7.6 eV and 3.6 eV upper limits were placed on the mixing probability of the electron neutrino with heavy neutrinos in the 370{endash}640 keV mass range. These limits vary from 1 to 4{percent}, at the 90{percent} confidence level. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 664887
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 4 Vol. 58; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ARGON 37
AUGER EFFECT
CHLORINE 37
CHLORINE IONS
ELECTRON CAPTURE DECAY
ELECTRON NEUTRINOS
GOLD
NUCLEAR DECAY
TIME-OF-FLIGHT METHOD