Q Spectroscopy With Superconducting Sensor Microcalorimeters

被引：16

作者：

Koehler, K. E. ^{[1
]}

Bennett, D. A. ^{[2
]}

Bond, E. M. ^{[1
]}

Croce, M. P. ^{[1
]}

Dry, D. E. ^{[1
]}

Horansky, R. D. ^{[2
]}

Kotsubo, V. ^{[2
]}

Moody, W. A. ^{[1
]}

Rabin, M. W. ^{[1
]}

Schmidt, D. R. ^{[2
]}

Ullom, J. N. ^{[2
]}

Vale, L. R. ^{[2
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[2] NIST, Boulder, CO 80305 USA

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2013年 / 60卷 / 02期

关键词：

Bolometers; cryogenics; radiation detectors; spectroscopy; superconducting devices; ALPHA; RESOLUTION; DETECTORS;

D O I：

10.1109/TNS.2012.2225639

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The total reaction energy (Q) of individual nuclear decays was measured using microcalorimeters with transition-edge-sensor (TES) thermometers. For alpha-decaying actinides (e.g., U-235, Pu-239, Np-237, Am-241), Q is in the 4-6 MeV range. Nearly all of this energy goes into the relatively light alpha particle, and approximately 100 keV is left over for the much heavier, recoiling daughter atom. Alpha-particle energy spectroscopy with TES-microcalorimeters has shown the ability to simultaneously resolve peaks that overlap in conventional alpha spectroscopy, with resolution now less than 1 keV full-width-at-half-maximum (FWHM) at 5.3 MeV. For total reaction energy spectroscopy, we use the same TES design as our alpha detectors, but embed a small radioactive sample (of about 1 Bq) directly inside an absorber designed to capture all the emitted particles (alpha, recoil nucleus, electrons, X-rays) with near 100% efficiency. We have measured Q-spectra of alpha-decaying isotopes with spectral resolution of 2-3 keV FWHM. For some actinide analytical problems, the Q-spectrum is simpler than the alpha-spectrum: fewer peaks, further apart, and easier to quantify. We will discuss sensor design, methods for embedding radionuclides, and spectral data.

引用

页码：624 / 629

页数：6

共 14 条

[1]

[Anonymous], 2009, IAEAAQ11

[2]

BORTELS G, 1987, APPL RADIAT ISOTOPES, V38, P831, DOI 10.1016/0883-2889(87)90180-8

[3] Defect production efficiency in metals under neutron irradiation [J].