A mercuric detector system for X-ray Astronomy. II, Results from flight tests of a balloon borne instrument / J.V. Vallerga, R.K. Vanderspek, and G.R. Ricker.
"To establish the expected sensitivity of a new hard X-ray telescope design, an experiment was conducted to measure the background counting rate at balloon altitudes (40 km) of mercuric iodide, a room temperature solid state X-ray detector. The prototype detector consisted of two thin mercuric...
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| Main Authors: | , , |
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| Corporate Author: | |
| Format: | Government Document Microfilm Book |
| Language: | English |
| Published: |
Cambridge, Massachusetts : [Washington, District of Columbia] :
Center for Space Research, Massachusetts Institute of Technology ; [National Aeronautics and Space Administration],
[1982]
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| Series: | NASA contractor report ;
NASA CR-175329. |
| Subjects: |
MARC
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| 100 | 1 | |a Vallerga, John Vincent, |e author. |0 http://id.loc.gov/authorities/names/n85805200 |1 http://isni.org/isni/0000000083715239. | |
| 245 | 1 | 2 | |a A mercuric detector system for X-ray Astronomy. |n II, |p Results from flight tests of a balloon borne instrument / |c J.V. Vallerga, R.K. Vanderspek, and G.R. Ricker. |
| 264 | 1 | |a Cambridge, Massachusetts : |b Center for Space Research, Massachusetts Institute of Technology ; |a [Washington, District of Columbia] : |b [National Aeronautics and Space Administration], |c [1982] | |
| 300 | |a 1 microfiche (16, 15 unnumbered pages) : |b negative, illustrations ; |c 11 x 15 cm. | ||
| 336 | |a text |b txt |2 rdacontent. | ||
| 337 | |a microform |b h |2 rdamedia. | ||
| 338 | |a microfiche |b he |2 rdacarrier. | ||
| 490 | 1 | |a NASA-CR-175329. | |
| 504 | |a Includes bibliographical references (page 16) | ||
| 500 | |a "CSR-HEA-82-46." | ||
| 520 | |a "To establish the expected sensitivity of a new hard X-ray telescope design, an experiment was conducted to measure the background counting rate at balloon altitudes (40 km) of mercuric iodide, a room temperature solid state X-ray detector. The prototype detector consisted of two thin mercuric iodide (HgI2) detectors surrounded by a large bismuth germanate (Bi4Ge3O12) scintillator operated in anticoincidence. The bismuth germanate shield vetoed most of the background counting rate induced by atmospheric gamma-rays, neutrons and cosmic rays. A balloon-borne gondola containing a prototype detector assembly was designed, constructed and flown twice in the spring of 1982 from Palestine, Texas. The second flight of this instrument established a differential background counting rate of 4.2 O.7 x 10-5 counts sec cm keV over the energy range of 40 to 80 keV. This measurement was within 50 of the predicted value. The measured rate is approx 5 times lower than previously achieved in shielded NaI CsI or Ge systems operating in the same energy range. The prediction was based on a Monte Carlo simulation of the detector assembly in the radiation environment at float altitude."--NTIS abstract. | ||
| 536 | |a Supported in part by NASA |c NSG-7339 and NAGW-14. | ||
| 650 | 0 | |a X-ray astronomy. |0 http://id.loc.gov/authorities/subjects/sh85148728. | |
| 650 | 0 | |a X-ray telescopes. |0 http://id.loc.gov/authorities/subjects/sh85148747. | |
| 650 | 7 | |a Balloon-borne instruments. |2 nasat. | |
| 650 | 7 | |a Bismuth. |2 nasat. | |
| 650 | 7 | |a Iodides. |2 nasat. | |
| 650 | 7 | |a Monte Carlo method. |2 nasat. | |
| 650 | 7 | |a Scintillation counters. |2 nasat. | |
| 650 | 7 | |a X ray astronomy. |2 nasat. | |
| 650 | 7 | |a X-ray astronomy. |2 fast |0 (OCoLC)fst01181814. | |
| 650 | 7 | |a X-ray telescopes. |2 fast |0 (OCoLC)fst01181854. | |
| 700 | 1 | |a Vanderspek, R. K. |q (Roland K.), |e author. |0 http://id.loc.gov/authorities/names/no2003065531 |1 http://isni.org/isni/000000004626247X. | |
| 700 | 1 | |a Ricker, G. R. |q (George R.), |e author. |0 http://id.loc.gov/authorities/names/no2003067271 |1 http://isni.org/isni/0000000046175149. | |
| 710 | 2 | |a Massachusetts Institute of Technology. |b Center for Space Research, |e issuing body. |0 http://id.loc.gov/authorities/names/n85830487. | |
| 710 | 1 | |a United States. |b National Aeronautics and Space Administration, |e sponsoring body. |0 http://id.loc.gov/authorities/names/n78087581 |1 http://isni.org/isni/0000000449071619. | |
| 776 | 0 | 8 | |i Online version: |a Vallerga, John Vincent. |t Mercuric detector system for X-ray astronomy |w (OCoLC)890470382. |
| 830 | 0 | |a NASA contractor report ; |v NASA CR-175329. |0 http://id.loc.gov/authorities/names/n83825229. | |
| 907 | |a .b43349055 |b 03-19-20 |c 07-18-07 | ||
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| 952 | f | f | |p Can circulate |a University of Colorado Boulder |b Boulder Campus |c Norlin |d Norlin Library - Government Information - Microform |e NAS 1.26:175329 |h Superintendent of Documents classification |i document |n 1 |