Matter dominated universe and study of {sup 48}Ca double beta decay

Journal Article · Thu Aug 12 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3485127· OSTI ID:21426515

Kishimoto, Tadafumi ^[1]

---

1. Research Center for Nuclear Physics, Osaka University 10-1 Mihogaoka Ibaraki Osaka (Japan)

We have been studying double beta decay of {sup 48}Ca. Neutrino-less double beta decay (0{nu}{beta}{beta}) is currently known to be only experiment to verify whether lepton number is not conserved. The non-conservation is the key to create matter dominated universe by the so-called Leptogenesys. Our first stage experiment using the ELEGANT VI detector system gave the best lower limit of the half life of 0{nu}{beta}{beta} of {sup 48}Ca. We have been developing CANDLES detector system to sense much longer life-time region. We have developed techniques to reduce backgrounds further. The CADLES detector system was installed at Kamioka underground laboratory. Here I describe a schematic view of the system.

• OSTI ID: 21426515
• Journal Information: AIP Conference Proceedings, Vol. 1269, Issue 1; Conference: OMEG-2010: 10. international symposium on origin of matter and evolution of galaxies, Osaka (Japan), 8-10 Mar 2010; Other Information: DOI: 10.1063/1.3485127; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DETECTION
CALCIUM 48
CP INVARIANCE
DOUBLE BETA DECAY
HALF-LIFE
LEPTON NUMBER
MULTIPARTICLE SPECTROMETERS
NEUTRINO DETECTION
NEUTRINO OSCILLATION
NEUTRINOS
UNDERGROUND
UNIVERSE
ALKALINE EARTH ISOTOPES
BETA DECAY
BETA-MINUS DECAY
CALCIUM ISOTOPES
CHARGED PARTICLE DETECTION
DECAY
DETECTION
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
INTERMEDIATE MASS NUCLEI
INVARIANCE PRINCIPLES
ISOTOPES
LEPTONS
LEVELS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
NUCLEAR DECAY
NUCLEI
RADIATION DETECTION
SPECTROMETERS
STABLE ISOTOPES