Bulk irradiation of ammonia for polarized target experiments

被引：0

作者：

Conover, Arthur ^{[1
]}

Bandara, Vibodha Yasas Sri ^{[2
]}

Keller, Dustin ^{[1
]}

Bateman, Fred ^{[3
]}

机构：

[1] Univ Virginia, Charlottesville, VA 22903 USA

[2] Univ Colombo, Colombo, Sri Lanka

[3] NIST, Gaithersburg, MD USA

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2024年 / 1068卷

关键词：

Ammonia; Irradiation; Dynamic nuclear polarization; Polarized targets; DYNAMIC NUCLEAR-POLARIZATION;

D O I：

10.1016/j.nima.2024.169717

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We present the simulation, design, and experimental results of a straightforward method for irradiating solid ammonia (NH3) 3 ) and solid deuterated ammonia (ND3) 3 ) to optimize their use in dynamic nuclear polarization (DNP) for scattering experiments. A prerequisite for DNP is a certain density of electron spins in the target material, provided by the concentration of F-centers generated by electron beam irradiation. We have developed an approach that efficiently irradiates large quantities of NH3 3 or ND3, 3 , producing approximately 25 grams of target material per hour. A key feature of the method is its near-homogeneous dose delivery, ensuring consistent quality across the entire batch. The production of optimized target material is crucial for polarized fixed target scattering experiments at accelerator facilities worldwide.

引用

页数：6

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