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National Aeronautics and Space Administration

Goddard Space Flight Center

Astrophysics Science Division | Sciences and Exploration

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GRIS background line list

Flight Line Flux (cnts cm-3 s-1 x 10-8) Flight Line Energy (keV) Line ID1 True Energy1 (keV) Ground Line Flux (cnts cm-3 s-1 x 10-8) Ground Line Energy (keV)
9429 24.6 70Ge (n,g) 71*Ge3 23.5
29121 28.5 I K x-ray 28.51 1632 28.7
9300 32.3 I K x-ray 32.42 741 32.2
9141 46.3 238U 210Pb 46.52 8846 46.5
173472 53.4 72Ge (n,g) 73*Ge 53.44 1017 53.4
214Pb 53.23
238U 234Th 63.3 14608 63.3
127084 66.2 72Ge (n,g) 73*Ge 66.7
3014 74.5 Bi K x-ray 74.815 3032 74.6
5178 77.1 Bi K x-ray 77.108 5673 77.3
2081 83.8 232Th 228Th 84.4 2071 84.1
1722 87.1 Bi K x-ray 87.1 1810 87.3
27999 92.6 67*Zn 93.32 20153 92.7
238U 234Th 92.55
232Th 228Ac 99.5 963 99.2
238U 234Pa 99.67
1401 102.3 67Ga 100.93
67Ga 102.98
718 109.4
1060 112.6 234Th 112.8 1012 112.9
2474 119.5 HEAO 119.4
65Ga 124.75
176716 139.8 74Ge (n,g) 75*Ge 139.68
1927 144 57Co 143.58 2214 144
235U 143.77
238U 234Pa 152.46 679 152.4
8224 159 123I 158.97
1631 162.9 235U 163.37 1067 163.5
5821 175.1 70Ge (n,g) 71*Ge3 174.9
13548 185.7 71As 186 11509 186.1
238U 226Ra 186
235U 185.72
3508 194 67Ga 194.24
312649 198.4 70Ge (n,g) 71*Ge3 198.4 1197 198.8
350 203.5
464 205.3 235U 205.33 1081 205.5
364 208.7
3402 212.3 121I 212.19
340 216.4 HEAO 216.2
18169 238.6 232Th 212Pb 238.63 17839 239
238U 214Pb 241.92
482 242.4 125Xe 243.4
895 257.5 119I 257.5
329 265.2
536 271.1 44*Sc 271.24 528 270.5
232Th 228Ac 270.3
1617 274.6 128Ba 273.44
532 280.5 HEAO 280.2
513 291.4
2693 295.3 238U 214Pb 295.22 4231 295.6
915 300.3 67Ga 300.2 573 300.6
232Th 212Pb 300.09
768 303.9
582 309.9 67Ga 309.86
1437 338.4 232Th 228Ac 338.7 2096 338.6
5227 351.9 238U 214Pb 351.99 6942 352.4
347 388.6 126I 388.63
983 403.1 67Ga 403.23
786 418
9777 438.8 69*Zn 438.6
1274 443 128Cs 442.87
12126 472.3 24*Na 472.3
253 484.3 HEAO 484.6
2808 497.5 115Sb 498
117372 511 e+ 511 647 511.6
466 532.4 121I 531.9
707 564.1 69Ge 563.72
232Th 208Tl 583.14 672 583.8
2641 584.6 69Ge 584.48
264 596.4 74As 595.9
1237 602.8 124I 602.72
385 609.4 238U 214Bi 609.31 3037 610
427 618.3
683 628.5
2261 644.1 119Te 644.01
1512 661.7 137Cs 661.6 2039 662.4
1795 666.4 HEAO 667.33
315 671.4
695
700 119Te 699.85
782 719.8 117Te 719.7
922 727.4 232Th 212Bi 727.27 1365 727.9
421 744.3 52Mn 744.21
1012 766.4 HEAO 766.3
238U 234*Pa 766.39 430 766.75
238U 214Bi 768.4 473 768.83
232Th 228Ac 772.1 127 772.57
234 835
9366 843.9 27*Al 843.76
232Th 208Tl 860.47 306 861.1
333 872.9
1850 882.7 69Ge 882.35
2421 911.2 232Th 228Ac 911.07 3854 911.7
238U 214Bi 934 314 934.2
232Th 228Ac 964.6 247 964.7
1569 969.2 232Th 228Ac 968.8 2247 969.6
257 975
HEAO 1000.7
1237 1001.2 238U 234*Pa 1001.1 1424 1001.5
3867 1014.6 27*Al 1014.4
320 1022.6
172 1039
149 1044
184 1077.6
552 1087.3 68Ga 1087.1
754 1107.8 69Ge 1106.8
4007 1117.4 69Ge 1117.1
238U 214Bi 1120.4 1898 1120.8
238U 214Bi 1155.3 311 1155.1
130 1173.5
238U 214Bi 1238.1 978 1238.4
133 1239
198 1274.2 22Na 1274.6
582 1293.5 116Sb 1293.5
130 1300.1
389 1347 69Ge 1347
886 1368.8 24Na 1368.5
148 1377.4 57Ni 1377.6 832 1377.8
238U 214Bi 1377.7
238U 214Bi 1401.6 225 1401.9
238U 214Bi 1408 449 1408.1
164 1434.7 52*Mn 1434.1
52*Mn 1434.1
27242 1460.8 40K 1460.8 45830 1460.9
232Th 228Ac 1501.5 190 1501.7
238U 214Bi 1509.2 405 1509.2
253 1588.2 232Th 228Ac 1587.9 667 1588
104 1602.8
119 1611.4 HEAO 1611.5
155 1621.3 212Bi 1620.6 420 1620.5
228Ac 1630.4 378 1630.3
1183 1633.5 20F 1632.6
232Th 228Ac 1638 165 1637.9
238U 214Bi 1661.4 178 1661
381 1715.7 117Te 1716.4
124 1729.3 238U 214Bi 1729.8 694 1729.3
24Na 1732.1
695 1763.9 238U 214Bi 1764.5 3688 1764.1
2080 1778.9 28Al 1778.7
58Mn 1779.2
346 1808.7 26*Mg 1808.7
118 1846.3 238U 214Bi 1847.6 548 1846.8
74 1961.6
73 2117.6 238U 214Bi 2118.7 365 2117.7
244 2203.6 238U 214Bi 2204.3 1333 2202.9
266 2224.2 2H 2223.35
116Sb 2225.3
183 2299 117Te 2300
320 2318.4 HEAO 2319.2
86 2427
56 2390.6
77 2447.4 238U 214Bi 2448 476 2446.2
649 2613.9 232Th 208Tl 2614.5 8596 2612.9
563 2753.4 24Na 2754.1
68 3005.5
40 3197.4
117 3799.4 66Ga 3801.1
51 4123.8 24Na 4122.7
93 4303.6 66Ga 4305.4
8152 4434.9 12C 4438
299 6130.3 16O 6129.2
33 7120.3 16O 7115.2
23 7420.7
27 7730.7
1 Lines marked HEAO were observed in the background spectrum of the HEAO-3 Ge spectrometer and the "true" energy is the HEAO-3 measured value.
2 Broad line flux derived from Gaussian fits.
3 These lines are generally attributed to this reaction but our results from the flight of a detector enriched in 70Ge show that this is not the dominant reaction (Gehrels et al. 1992).