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.
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页数：6
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