Status of the NPDGamma Experiment at the SNS

Ricardo Alarcon; S. Balascuta

doi:10.1007/s10751-013-0773-1

Status of the NPDGamma Experiment at the SNS

Ricardo Alarcon, S. Balascuta

Physics

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

The main goal of the NPDGamma experiment is to measure the gamma-ray asymmetry with respect to the neutron spin direction in the nuclear reaction n+ p → d + γ. The up-down asymmetry A_γ has a predicted size of the order of 5 ·10^-8, and the NPDGamma experiment is designed to measure it with an uncertainty of about 10^-8. To test the entire apparatus the gamma-ray asymmetry from neutron capture was measured using a Cl target followed by measurements on Al to establish the relevant background levels. At present the experiment is taking data with a liquid H₂ target to measure the parity violation on the n+ p → d + γ reaction and extract the ΔI = 1 part of the hadronic weak interaction.

Original language	English (US)
Pages (from-to)	149-155
Number of pages	7
Journal	Hyperfine Interactions
Volume	214
Issue number	1-3
DOIs	https://doi.org/10.1007/s10751-013-0773-1
State	Published - Mar 2013

Keywords

Gamma rays
Neutron capture
Parity violation
Weak interation

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Nuclear and High Energy Physics
Condensed Matter Physics
Physical and Theoretical Chemistry

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10.1007/s10751-013-0773-1

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abstract = "The main goal of the NPDGamma experiment is to measure the gamma-ray asymmetry with respect to the neutron spin direction in the nuclear reaction n+ p → d + γ. The up-down asymmetry Aγ has a predicted size of the order of 5 ·10-8, and the NPDGamma experiment is designed to measure it with an uncertainty of about 10-8. To test the entire apparatus the gamma-ray asymmetry from neutron capture was measured using a Cl target followed by measurements on Al to establish the relevant background levels. At present the experiment is taking data with a liquid H2 target to measure the parity violation on the n+ p → d + γ reaction and extract the ΔI = 1 part of the hadronic weak interaction.",

keywords = "Gamma rays, Neutron capture, Parity violation, Weak interation",

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AU - Balascuta, S.

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N2 - The main goal of the NPDGamma experiment is to measure the gamma-ray asymmetry with respect to the neutron spin direction in the nuclear reaction n+ p → d + γ. The up-down asymmetry Aγ has a predicted size of the order of 5 ·10-8, and the NPDGamma experiment is designed to measure it with an uncertainty of about 10-8. To test the entire apparatus the gamma-ray asymmetry from neutron capture was measured using a Cl target followed by measurements on Al to establish the relevant background levels. At present the experiment is taking data with a liquid H2 target to measure the parity violation on the n+ p → d + γ reaction and extract the ΔI = 1 part of the hadronic weak interaction.

AB - The main goal of the NPDGamma experiment is to measure the gamma-ray asymmetry with respect to the neutron spin direction in the nuclear reaction n+ p → d + γ. The up-down asymmetry Aγ has a predicted size of the order of 5 ·10-8, and the NPDGamma experiment is designed to measure it with an uncertainty of about 10-8. To test the entire apparatus the gamma-ray asymmetry from neutron capture was measured using a Cl target followed by measurements on Al to establish the relevant background levels. At present the experiment is taking data with a liquid H2 target to measure the parity violation on the n+ p → d + γ reaction and extract the ΔI = 1 part of the hadronic weak interaction.

KW - Gamma rays

KW - Neutron capture

KW - Parity violation

KW - Weak interation

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Status of the NPDGamma Experiment at the SNS

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Keywords

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