Lithium-Drifted p-i-n Junction Detectors
Lithium-ion-drifted diodes were prepared by diffusion of lithium into silicon in vacuo at 350 to 400 deg C, followed by electric-field-drift in a silicone oil bath at 150 deg C. Extension of the sensitive region toward the p- type surface was interrupted and observed intermittently by means of alpha particles incident upon this surface at energies from 6 to 9 Mev. Ion-drift was then continued until the plot of pulse-height vs energy for these alpha particles showed a negligible (<50 kev) energy intercept for distances of drift up to 4 mm from the lithium-diffused surface. The response to protons at energies from 4.5 to 10 Mev was linear to within plus or minus 0.3%. The resolution width (FWHM) for protons at the higher energy, for deuterons at 20 Mev, and for alpha particles at 40 Mev was limited by beam energy spread in a cyclotron. At room temperature, resolution widths down to 20 kev were observed for electrons at energies of 0.5 and 1 Mev, and that for gamma rays was 9 kev at 661 kev. Resolution widths down to 12 or 13 kev were observed for electrons at 1 Mev when the detectors were cooled to liquid nitrogen temperature.
- Research Organization:
- Argonne National Lab., Ill.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-16-029141
- OSTI ID:
- 4805720
- Journal Information:
- IRE Transactions on Nuclear Science, Journal Name: IRE Transactions on Nuclear Science Journal Issue: 4 Vol. 9; ISSN 0096-2015
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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