자료유형  

 학위논문

Control Number  

0016932160

International Standard Book Number  

9798379911379

Dewey Decimal Classification Number  

593.7

Main Entry-Personal Name  

Hostiuc, Alexandru.

Publication, Distribution, etc. (Imprint  

[S.l.] : University of Washington., 2023

Publication, Distribution, etc. (Imprint  

Ann Arbor : ProQuest Dissertations & Theses, 2023

Physical Description  

1 online resource(247 p.)

General Note  

Source: Dissertations Abstracts International, Volume: 85-01, Section: B.

General Note  

Advisor: Detwiler, Jason.

Dissertation Note  

Thesis (Ph.D.)--University of Washington, 2023.

Restrictions on Access Note  

This item must not be sold to any third party vendors.

Summary, Etc.  

요약The MAJORANA Collaboration is searching for the neutrinoless double-β decay of 76Ge. The MAJORANA DEMONSTRATOR consists of two modular arrays of high-purity Ge detectors operated in vacuum cryostats housed in a low-background shield at the Sanford Underground Research Facility in Lead, South Dakota. The arrays have operated with up to 48.5 kg of detectors (30.9 kg enriched to ∼88% in 76Ge). The DEMONSTRATOR has completed operation of its enriched detectors, and a limit has been produced with 64.5 ± 0.9 kg-yr of enriched exposure. This thesis describes the development and implementation of the DCR (Delayed Charge Recovery) estimator, used for surface alpha background rejection. The properties of the alpha spectrum described herein show the absolutely critical importance of surface alpha background rejection, and DCR in particular, in the performance of the MAJORANA DEMONSTRATOR. The thesis also describes a parallel, independent statistical analysis of the full MAJORANA DEMONSTRATOR 76Ge dataset, yielding a 0νββ decay half-life lower limit of 8.4 x 1025 years, and an upper limit on mββ of 112 − 267 meV, depending on the nuclear matrix element used.

Subject Added Entry-Topical Term  

Particle physics.

Subject Added Entry-Topical Term  

Nuclear physics.

Subject Added Entry-Topical Term  

Statistical physics.

Index Term-Uncontrolled  

MAJORANA Collaboration

Index Term-Uncontrolled  

DCR

Index Term-Uncontrolled  

Detectors

Index Term-Uncontrolled  

Nuclear matrix

Index Term-Uncontrolled  

Alpha background rejection

Added Entry-Corporate Name  

University of Washington Physics

Host Item Entry  

Dissertations Abstracts International. 85-01B.

Host Item Entry  

Dissertation Abstract International

Electronic Location and Access  

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Control Number  

joongbu:640536