A new scanning system for alpha decay events as calibration sources for range-energy relation in nuclear emulsion

J. Yoshida, S. Kinbara, A. Mishina, K. Nakazawa, M. K. Soe, A. M.M. Theint, K. T. Tint

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

A new scanning system named “Vertex picker” has been developed to rapid collect alpha decay events, which are calibration sources for the range-energy relation in nuclear emulsion. A computer-controlled optical microscope scans emulsion layers exhaustively, and a high-speed and high-resolution camera takes their micrographs. A dedicated image processing picks out vertex-like shapes. Practical operations of alpha decay search were demonstrated by emulsion sheets of the KEK-PS E373 experiment. Alpha decays of nearly 28 events were detected in eye-check work on a PC monitor per hour. This yield is nearly 20 times more effective than that by the conventional eye-scan method. The speed and quality is acceptable for the coming new experiment, J-PARC E07.

Original languageEnglish
Pages (from-to)86-92
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume847
DOIs
Publication statusPublished - 2017 Mar 1
Externally publishedYes

Keywords

  • Hypernucleus
  • Nuclear emulsion
  • Range-energy relation
  • Vertex picker
  • α Decay

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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