First use of single-crystal diamonds as fission-fragment detector
Artikel i vetenskaplig tidskrift, 2015

Single crystal chemical vapor deposited diamond (sCVD) was investigated for its ability to act as Fission fragment detector. In particular we investigated timing and energy resolution for application in a simultaneous time and energy measurement to determine the mass of the detected fission fragment. Previous tests have shown that poly crystalline chemical vapor deposited (pCVD) diamonds provide sufficient timing resolution, but their poor energy resolution did not allow complete separation between very low energy fission fragments, alpha-particles and noise. Our present investigations prove artificial sCVD diamonds to show similar timing resolution as pCVD diamonds close to 100 ps. Improved pulse height resolution allows the unequivocal separation of fission fragments, and the detection efficiency reaches 100%, but remains with about a few percent behind requirements for fragment mass identification. With high-speed digital electronics a timing resolution well below 100 ps is possible. However, the strongly varying quality of the presently available diamond material does not allow application on a sufficiently large scale within reasonable investments.

Artificial diamond

Time-of-flight

Chemical vapor deposited diamond

Timing resolution

Fission fragment spectroscopy

Författare

M. O. Fregeau

European Commission Joint Research Centre, Institute for Reference Materials and Measurements

S. Oberstedt

European Commission Joint Research Centre, Institute for Reference Materials and Measurements

T. Brys

European Commission Joint Research Centre, Institute for Reference Materials and Measurements

T. Gamboni

European Commission Joint Research Centre, Institute for Reference Materials and Measurements

W. Geerts

European Commission Joint Research Centre, Institute for Reference Materials and Measurements

F. J. Hambsch

European Commission Joint Research Centre, Institute for Reference Materials and Measurements

Andreas Oberstedt

Chalmers, Fundamental fysik

M. Vidali

European Commission Joint Research Centre, Institute for Reference Materials and Measurements

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

0168-9002 (ISSN)

Vol. 791 58-64 57688

Ämneskategorier

Fysik

DOI

10.1016/j.nima.2015.04.030