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Uranium (यूरेनियम)

Uranium(यूरेनियम):
Uranium:
Uranium is a very heavy metal which can be used as an abundant source of concentrated energy. Many contemporary uses of uranium exploit its unique nuclear properties. Uranium-235 has the distinction of being the only naturally occurring fissile isotope. Uranium-238 is fissionable by fast neutrons, and is fertile, meaning it can be transmuted to fissile plutonium-239 in a nuclear reactor. Another fissile isotope, uranium-233, can be produced from natural thorium and is also important in nuclear technology. While uranium-238 has a small probability for spontaneous fission or even induced fission with fast neutrons, uranium-235 and to a lesser degree uranium-233 have a much higher fission cross-section for slow neutrons. In sufficient concentration, these isotopes maintain a sustained nuclear chain reaction. This generates the heat in nuclear power reactors, and produces the fissile material for nuclear weapons. Depleted uranium (238U) is used in kinetic energy penetrators and armor plating.

यूरेनियम:
 यूरेनियम एक बहुत भारी धातु है जिसका उपयोग केंद्रित ऊर्जा के प्रचुर स्रोत के रूप में किया जा सकता है।  यूरेनियम के कई समकालीन उपयोग इसके अद्वितीय परमाणु गुणों का फायदा उठाते हैं।  यूरेनियम -235 को केवल प्राकृतिक रूप से पाए जाने वाले फिसाइल आइसोटोप होने का गौरव प्राप्त है।  यूरेनियम -238 तेजी से न्यूट्रॉन द्वारा विखंडनीय है, और उपजाऊ है, जिसका अर्थ है कि यह परमाणु रिएक्टर में फिसल प्लूटोनियम -239 को प्रसारित किया जा सकता है।  एक अन्य फिसाइल आइसोटोप, यूरेनियम -233, प्राकृतिक थोरियम से उत्पादित किया जा सकता है और परमाणु प्रौद्योगिकी में भी महत्वपूर्ण है।  जबकि यूरेनियम -238 में तेजी से न्यूट्रॉन के साथ सहज विखंडन या यहां तक ​​कि प्रेरित विखंडन के लिए एक छोटी संभावना है, यूरेनियम -235 और कुछ हद तक यूरेनियम -233 में धीमी न्यूट्रॉन के लिए बहुत अधिक विखंडन क्रॉस-सेक्शन है।  पर्याप्त एकाग्रता में, ये आइसोटोप एक निरंतर परमाणु श्रृंखला प्रतिक्रिया बनाए रखते हैं।  यह परमाणु ऊर्जा रिएक्टरों में गर्मी उत्पन्न करता है, और परमाणु हथियारों के लिए विखंडनीय सामग्री का उत्पादन करता है।  अवक्षेपित यूरेनियम (238U) का उपयोग गतिज ऊर्जा मर्मज्ञों और कवच चढ़ाना में किया जाता है।
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