@article{oai:jaxa.repo.nii.ac.jp:00032290,
 author = {等松, 隆夫 and 小川, 利紘 and TOMATSU, Takao and OGAWA, Toshishiro},
 issue = {1_B},
 journal = {東京大学宇宙航空研究所報告},
 month = {Mar},
 note = {1970年9月19目20時30分に打ち上げられた観測ロケット,L3H6号機による高度250～2,017kmの間で地球コロナおよび惑星間空間に起因するとおもわれるヘリウム584Åおよび304Åグローの測定結果にっいてのべる.He 584Å強度は上昇時250～720 kmの範囲で40から100R と増加し,それ以後ぱ減少し,高度1,600 kmでは30Rになった.ロケット下降時には1,400～600kmの範囲では約5R,それ以後ぱ減少し,440kmでは2R以下であった.この結果をもちいて求めた中性大気の温度は1,180°K±50゜Kであり,またヘリウム密度は720kmにおいて(1.2±O.2)×10^6 atoms/cm^3となった.一方,He^+ 304Åは420～1,200kmの開て12から4Rに減少し,また下降時には1.5±0.5Rであった.この強度は電離層に存在するヘリウムイオン量からすると強すぎるので,惑星間ブローである分算が大きい., The altitude distribution of the extreme ultraviolet emissions of neutral helium (He^+ 584 A) and singly ionized helium (He^+ 304 A) was measured by aluminum and bismuth thin-film photon counters aboard an exospheric sounding rocket flown from Uchinoura, Japan, on September 19, 1970, 2030 JST. On ascent the He 584-A intensity increased from 40 to 100 R between 250 to 720 km and then decreased gradually to 30 R at 1,600 km. On the downleg the intensity remained nearly constant at 5R between 1,400 and 600km and then decreased gradually to about 2R at 440km. The excitation mechanism of the He 584-A glow is ascribed to resonance fluorescence of atmospheric helium by solar 584-A radiation. The observed distribution is consistent with a diffusive equilibrium distribution of helium at a thermopause temperature of 1,180±50°K and having a base-line value of density of (1.2±0.2) × 10^6 atoms/cm^3 at 720km. The intensity of He^+ 304-A glow decreased from 12 to 4R on ascent from 420 to 1,200km and then remained almost steady at 1.5 ±0.5R through the same altitude range on descent. The absolute intensity of the 304-A flow was at least 2.5 times greater than expected from resonance fluorescence by ionospheric helium ions of solar 304-A radiation. Evidence for the presence of extraterrestrial helium glow is discussed, 資料番号: SA0125466000},
 pages = {49--58},
 title = {地球コロナおよび惑星間ヘリウムグローの観測},
 volume = {8},
 year = {1972}
}