Papa alakaʻiʻO ka mea nui o ke kēpau, ʻo ke alakaʻi he metala koʻikoʻi koʻikoʻi, he nui nā hiʻohiʻona, ʻoi aku ka nui o ka nui o kona density, ʻoi aku ka kiʻekiʻe o ka paʻakikī a me nā hana anti-corrosion a me nā hana anti-wear. Me ka nui nui a me ka nui, hoʻohana nui ʻia i ka hana ʻana i nā pihi alakaʻi, ʻoihana waikawa a me ka ʻoihana metallurgical me ka pā alakaʻi, ke alakaʻi paipu e like me nā lako mālama lole, ʻoihana uila e like me ke alakaʻi kaula a me ka fuse. Hoʻohana ʻia nā ʻāpana kepau i loaʻa i ka tin a me ka antimony no ka paʻi ʻana, hoʻohana ʻia nā ʻāpana kēpau no ka hana ʻana i nā electrodes fusible, a hoʻohana ʻia nā papa alakaʻi a me nā pā kila i hoʻopaʻa ʻia i ka ʻoihana kūkulu. Loaʻa i ke alakaʻi maikaʻi ka lawe ʻana i nā kukui X-ray a me nā kukui gamma a hoʻohana nui ʻia e like me ka ʻikepili mālama no nā mīkini X-ray a me nā lako mana atomic. Ua pani ʻia a hoʻololi ʻia ke kepau e nā ʻike ʻē aʻe ma kekahi mau kahua no nā kumu o ka ʻawaʻawa a me ka waiwai. Hoʻohana ʻia kekahi o nā mea koʻikoʻi ma ke kahua o ka pale ʻana i ka radiation. Penei ka hana ana o ka papa alakai i ka pale ana i ka radiation.
Ua nāwaliwali ke komo ʻana o ka particle α, hiki i kahi ʻāpana pepa ke poloka; Hiki ke pa'a loa ka papa alaka'i pale, 'a'ole 'ai 'ia ka nānā 'ana o ka radiation alpha, 'ili 'ili. ʻO kekahi ʻo ka beta ray, nona ke komo haʻahaʻa. Hiki i ka papa alakaʻi pale maʻamau ke ālai i ka hapa nui o nā kukuna, akā mālama mau ʻia ka ray beta me ka pale o ka helu atomika haʻahaʻa, i ʻole e hana i ka bremsstrahlung. ʻO ka hope, hana ʻia ka gamma ray me ka α a me ka β, me ke komo ikaika ʻana, hiki i kahi mānoanoa o ka papa alakaʻi pale ke pale i kahi ʻāpana o ka ikaika o ka ray gamma, radioactive ikaika me ka mānoanoa o ka pā alakaʻi pale e like me ka exponential law attenuation, theoretically ʻaʻole hiki ke paʻa loa. Akā, ʻaʻohe pono no kahi pale piha. ʻOiaʻiʻo, aia ka radioactivity ma nā wahi a pau, a aia ka radiation ma nā wahi a puni, ʻoiai ke mālama ʻia i loko o nā palena kūpono.
Ka manawa hoʻouna: Jul-04-2022