Optimum Exposure Dose Research Articles

123. CR の適正線量について (第 3 報)(画像理論-4 CR)

123. CR の適正線量について (第 3 報)(画像理論-4 CR)

31. CR の適正線量について [第 2 報](CR-2 基礎 (2))

31. CR の適正線量について [第 2 報](CR-2 基礎 (2))

123. CR の適正線量について (第 3 報)(第 48 回総会学術大会一般研究発表予稿)

123. CR の適正線量について (第 3 報)(第 48 回総会学術大会一般研究発表予稿)

What is the optimum exposure dose for a positive resist containing poly-functional photoactive compound?

Latent image concentration gradients are examined for the purpose of selecting photoresist exposure dose to optimize lithographic process latitudes. This is treated for the general case where multi-functional photoactive compounds are present in the resist and there is a supralinear relationship between dissolution rate and dose. Results are compared with two resist systems for which the process photospeed has been varied, one with a low qeff and another with a qeff >5.

295. CR の撮影線量 : 適正線量について(第 47 回総会学術大会一般研究発表予稿)

295. CR の撮影線量 : 適正線量について(第 47 回総会学術大会一般研究発表予稿)

31. CR の適正線量について〔第 2 報〕(第 19 回秋季学術大会一般研究発表予稿)

31. CR の適正線量について〔第 2 報〕(第 19 回秋季学術大会一般研究発表予稿)

295. CR の撮影線量 (適正線量) について(CR-3 画質改善)

295. CR の撮影線量 (適正線量) について(CR-3 画質改善)

Thin-film CaF2 inorganic electron resist and optical-read storage medium

Polished silicon substrates were e-gun deposited with 100-nm films of CaF2 in a molecular beam epitaxy vacuum station. Measurements of this material system reveal a factor of 35 reduction in reflectivity for films exposed to electron irradiation. Exposure is accomplished by simply viewing the desired area using a 3-kV Auger electron microprobe. It is further reported that this exposed inorganic material can be developed (selectively washed away) in H2O. In addition, both over and under exposures have been observed. Optimum electron exposure dose has been determined to be 0.1–0.2 C/cm2.

ポリマー含浸コンクリートの力学的特性における重合放射線のエネルギー依存性

The purpose of this paper is to study the characteristics of polymerization on polymer impregnated concrete (PIC) polymerized by various radiation source which have the peculiar energy respectively as follows; Gamma-rays : ^<60>Co-1.25MeV, ^<137>Cs-0.66MeV, X-Ray : 0.88MeV and accelerated electron beam 4.0, 2.0 and 1.2MeV. This experimental program was carried out to investigate the effect of radiation energy, dencity of cement mortar, optimum irradiating conditions and other factors which have influence upon the polymerization and strength of PIC. The test results shows that the energy dependency on the accelerated electran was remarkable effect for relative absorption energy and strength of specimens (Fig. 5) and it can be estimate that the impregnation depth from the surface of specimens in ordinary mortar MMA-PIC were about 10mm, 6mm, and 3mm as to 4.0, 2.0 and 1.2MeV respectively under curing 50 Mrads (Fig. 2). It is also show that the optimum total exposure dose on magnetic electro wave methods, estimate about 3MR at ^<60>Co; 1×10^6R/hr, 2MR at ^<137>Cs; 4.5×10^4R/hr and 2MR at X-ray; 5×10^5R/hr at curing temperature 20℃ (Fig. 9, Fig. 10). We can see the fact that the energy dependency is noticiable only comparing same kinds of radiation source.

Fabrication Characteristics and Strength of Polymer-Impregnated Concrete Polymerized by Accelerated Electron

Since the accelerated electron has by far a higher dose rate than gamma-rays, the electron polymerizing method is more suitable for the efficient fabrication of polymer-impregnated concrete (PIC) with a thin cross section. However, there are few published papers on the manufacturing process of PIC polymerized by electron beam.This experiment was carried out to investigate the effects of density of cement mortar, dose rate of electron beam (4MeV), total exposure dose and other factors which have influences upon the strength of MMA-PIC. The density of mortar, size of cross section of mortar specimens, dose rate of electron, total exposure dose and irradiating time interval were varied respectively as follow; ρ=1.55∼3.13g/cm3 (the kinds of aggregates in cement mortar used are perlite, artificial light weight aggregate, normal river sand and iron sand), t=3.5∼40mm in thickness, 0.55 or 1.10 Mrads/sec, 12.5∼100 Mrads per face, and 15∼60sec/cycle.The test results of mechanical strength of PIC show that the optimum total exposure dose is about 40Mrads at 0.55Mrads/sec rate and 50Mrads at 1.1Mrads/sec in the ordinary mortar. It is also shown that the impregnation depth from the surface of specimen has a linear relation with the density of cement mortar, and that its depth is about 1cm in conventional mortar.