Neutron-Induced Partial Cross-Section Measurements on $^{76}$Ge Motivated by The Majorana Project 0$\nu\beta\beta$ Decay Search

POSTER

Abstract

The goal of the Majorana Collaboration is to study 0$\nu\beta\beta$ in order to verify that the neutrino is its own anti-particle; and if so, what is the mass ofthe electron neutrino. Observation of a sharp peak at the $\beta\beta$ endpoint energy will confirm 0$\nu\beta\beta$ as a decay mode, and determination of the partial width will determine the matrix element which depends directly on the electron neutrino mass. In order to observe and verify the existence of 0$\nu\beta\beta$, it is important to reduce intrinsic, extrinsic,\& cosmogenic backgrounds. The Majorana Project will operate with HPGe detectors deep underground to achieve a low-background environment. Recent advances in signal processing and detector design have also enabled scientists to further understand background sources. $\gamma$-ray spectra from the interaction of pulsed mono-energetic neutrons with $^{76}$Ge were measured at TUNL using segmented HPGe clover detectors. The neutron-induced partial cross-sections for $\gamma$ transitions in $^{76}$Ge were measured at E$_n$ = 8 and 12MeV.

*Supported by DOE grant DE-FG02-97ER41033 and NSF-05-523327.

Authors

  • S. Hilderbrand

    • NC Central Univ.
  • E. Kwan

    • TUNL
  • C. Angell

    • TUNL
  • B. Fallin

    • TUNL
  • C.R. Howell

    • TUNL
  • A. Hutcheson

    • TUNL
  • H.J. Karwowski

    • TUNL
  • J.H. Kelley

    • TUNL
  • A.P. Tonchev

    • TUNL
  • W. Tornow

    • TUNL
  • D.B. Masters

    • Samford Univ.
  • R.S. Pedroni

    • NC A\&T State Univ.
  • G.J. Weisel

    • Penn State Altoona