Lipson H G
Rome Air Dev. Center, Hanscom AFB, MA.
IEEE Trans Ultrason Ferroelectr Freq Control. 1990;37(6):524-9. doi: 10.1109/58.63108.
Optical absorption at He-Ne and argon laser frequencies has been used to map the distribution of aluminium-hole centres, Al-H(+), in irradiated and vacuum swept quartz. The absorption band associated with Al-h(+) has a strong peak centered at 435 nm and a weaker one at 633 nm. Argon laser lines at 488 and 514.5 nm are close to the wavelength of the stronger peak, while the He-Ne line at 632.8 nm is nearly coincident with that of the weaker peak. Large variations in Al-h(+) absorption for irradiated and vacuum swept crystals correspond to visually observed changes in coloration. The laser method is sensitive and nondestructive, and gives a quantitative measurement adaptable to computerized scanning and recording of data. Measurements of both Al-h(+) and infrared-active aluminium hydroxide centres, Al-OH(-), are used to evaluate the distribution of aluminium-associated defect centres and determine aluminium variations over an entire crystal.
利用氦氖激光和氩激光频率下的光吸收来绘制经辐照和真空吹扫的石英中铝空穴中心Al-H(+)的分布情况。与Al-h(+)相关的吸收带在435nm处有一个强峰，在633nm处有一个较弱的峰。氩激光在488nm和514.5nm处的谱线接近较强峰的波长，而氦氖激光在632.8nm处的谱线几乎与较弱峰的波长重合。经辐照和真空吹扫的晶体中Al-h(+)吸收的大幅变化对应于肉眼观察到的颜色变化。激光方法灵敏且无损，能进行定量测量，适用于计算机扫描和数据记录。对Al-h(+)和红外活性氢氧化铝中心Al-OH(-)的测量用于评估与铝相关的缺陷中心的分布，并确定整个晶体中铝的变化情况。
