Engineering topics

Konovalov, S I

Publications and source records attributed to Konovalov, S I.

4 records

DOE OSTI2011

Double {beta} experiments with the help of scintillation and HPGe detectors at Gran Sasso

A search for double beta decay of {sup 64,70}Zn, {sup 180,186}W was carried out by using low background ZnWO{sub 4} crystal scintillators, while a CeCl{sub 3} scintillation detector was applied to investigate 2{beta} processes in {sup 136,138,142}Ce. A search for 2{beta} decay of {sup 96,104}Ru, {sup 156,158}Dy, {sup 190,198}Pt and study of 2{nu}2{beta} decay of {sup 100}Mo to the first excited 0{sup +} level of {sup 100}Ru were realized by ultra-low background HPGe {gamma} spectrometry. Moreover, CdWO{sub 4} crystal scintillators from enriched {sup 106}Cd and {sup 116}Cd isotopes were developed to search for 2{beta} decay of {sup 106}Cd and {sup 116}Cd. Finally, experiments aimed to investigate {sup 96,104}Ru and {sup 116}Cd are in progress and a new phase of the experiment to search for 2{beta} processes in {sup 106}Cd is in preparation.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗

DOE OSTI2011

The Majorana Experiment

The Majorana collaboration is actively pursuing research and development aimed at a tonne-scale {sup 76}Ge neutrinoless double-beta decay ({beta}{beta}(0{nu})-decay) experiment. The current, primary focus is the construction of the Majorana Demonstrator experiment, an R and D effort that will field approximately 40 kg of germanium detectors with mixed enrichment levels. This article provides a status update on the construction of the Demonstrator.

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND ↗

DOE OSTI2011

Improved limits on {beta}{sup +}EC and ECEC processes in {sup 112}Sn

Limits on {beta}{sup +}EC and ECEC processes in {sup 112}Sn have been obtained using a 380 cm{sup 3} HPGe detector and an external source consisting of 100 g enriched tin (94.32% of {sup 112}Sn). A limit with 90% C.L. on the {sup 112}Sn half-life of 1.3x10{sup 21} yr for the ECEC(0{nu}) transition to the 0{sub 3}{sup +} excited state in {sup 112}Cd (1871 keV) has been established. This transition has been discussed in the context of a possible enhancement of the decay rate. The limits on other {beta}{sup +}EC and ECEC processes in {sup 112}Sn have also been obtained on the level of (0.1-1.6)x10{sup 21} yr at the 90% C.L.

73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗

DOE OSTI2011

The MAJORANA Experiment

The Majorana Collaboration is assembling an array of HPGe detectors to search for neutrinoless double-beta decay in {sup 76}Ge. Initially, Majorana aims to construct a prototype module to demonstrate the potential of a future 1-tonne experiment. The design and potential reach of this prototype Demonstrator module are presented.

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗