Pengaruh perubahan suhu pada sifat men - pasir yang bervariasi terhadap radiasi pengion

Abstract

Attenuation characteristic of matter is ability to absorb or decrease intensity of radiation that for down to surface of matter. Decreasing of radiation cause interaction with matter, happened through three process¬es : photoelectric effect. compton scattering effect and pair production effect_ Increasing temperature of matter, cause atomic vibration to grow worse until limited Debye's tempera-tu•e. So, Debye's temperature specific of matter show atomic got maximum. If increased temperature again, possible will be happend damage to atomic matter. Before that, its happend discharge electrons of matter, will influence attenuation characteristic. With increasing temperture of matter, coefficient of attenuation become decrease. So radiation out of matter more and more increase. It's called happend radiation leaking out. Sifat atenuasi suatu materi adalah kemampuan meny¬erap atau mengurangi intensitas radiasi yang mengenai permukaannya. Hilangnya energi radiasi karena berinter¬aksi dengan materi, disebabkan tiga proses : efek foto¬listrik, efek hamburan compton efek produksi pasangan. Kenaikan suhu pada materi, menyebabkan. getaran atomnva semakin menghebat, sampai batas suhu Debye-nya. Jadi suhu Debye suatu materi menuniukkan getaran atom-atomma sudah mencapai maksimum. Di la suhu dinaikkan lagi kemungkinan atom materi akan rusak. Dengan adanva kepiadian tersebut. maka perubahan suhu akan mempengaruhi sifat. atenuasinya. Semakin tinggi suhu. koefisien atenu¬asi semakin kecil sehingga radiasi yang lobos semakin banyak, maka dikatakan terjadi kebocoran radiasi.