Mössbauer effect

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Recoilless emission and recoilless absorption of gamma photons is called Mossbauer effect. It provides us a technique for producing and studying gamma rays whose energies are extremely well defined. Mossbauer effect was discovered by Rudolf Mossbauer in 1958. This effect is applied in the experimental field by the name Mossbauer spectroscopy. Let us first understand why a  nuclear transitions  occurs. After a radioactive nucleus undergoes decay (alpha decay, beta decay, k-capture) it many times reaches to the daughter nuclei state but contains too much energy to be in a final stable state. Unlike our electrons orbiting the nucleus, the nucleus itself doesn’t really have such orbits which are easy to visualize. So, let us just imagine it having a particular quantized energy. Now, to be in a stable ground state it must lose this extra energy. It does this by emitting gamma radiation of that energy. This is the process of nuclear transition, where the nucleus transitions from one
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Introduction to Astronomy

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The Whirlpool Galaxy in the constellation
Canis Venatici.
Astronomy is a study of the celestial objects in science.
Its sub-fields are:
  • Astrophysics
  • Astrobiology
  • Astrochemistry

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Mössbauer effect

-
Image
Recoilless emission and recoilless absorption of gamma photons is called Mossbauer effect. It provides us a technique for producing and studying gamma rays whose energies are extremely well defined. Mossbauer effect was discovered by Rudolf Mossbauer in 1958. This effect is applied in the experimental field by the name Mossbauer spectroscopy. Let us first understand why a  nuclear transitions  occurs. After a radioactive nucleus undergoes decay (alpha decay, beta decay, k-capture) it many times reaches to the daughter nuclei state but contains too much energy to be in a final stable state. Unlike our electrons orbiting the nucleus, the nucleus itself doesn’t really have such orbits which are easy to visualize. So, let us just imagine it having a particular quantized energy. Now, to be in a stable ground state it must lose this extra energy. It does this by emitting gamma radiation of that energy. This is the process of nuclear transition, where the nucleus transitions from one
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Uses of ICT in astronomy.

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The blog of Phil Plait. ICT is used by us in many walks of life. Similarly, ICT has its importance in astronomy too. But how?ICT does not only mean computers and internet, it also means softwares. Softwares such as Stellarium help the young to awaken the spirit of astronomy in them. The students can use  such softwares to learn about the astronomical objects even in the absence of telescope. ICT, through internet imparts the knowledge of astronomy to people. Blogs on astronomy by various scientists and sceptic writers helps people to learn more about astronomy and people can keep updating their knowledge of astronomy. ICT also helps the people to understand the topics clearly with the help of videos . For example, videos available on 'youtube'. ICT can also be used to make simulations of various astronomical phenomena, like stimulations of the life cycle of stars. This method of learning proves useful for post-graduate students. Universe is the place we live in,
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CZTI detects a gamma ray burst!!

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CZTI was very lucky as on its first day Swift satellite had detected a gamma ray burst(GRB) named GRB 151006A. The scientists at ISRO were eager to know whether CZTI was operational at that time(i.e., outside SAA) & if the GRB was in a favourable condition to be observed. The calculation by the scientists at ISRO showed that the burst was detected 60.7° away from the direction where CZTI was presently pointing at. At this angle CZTI is sensitive to GRBs at energies greater than about 60 keV. The group of young scientists at ISRO delved into the sea of vast data to extract the precious information from GRB 151006A. (Statistics available here .)  We have the Swift and the Fermi satellites observing lots of GRBs, so what if CZTI detects one more?  The Swift satellite, as the name says, is swift at pointing a GRBs but is unable to observe those above 150 keV and fix its spectral parameter for GRBs with hard spectrum. On the other hand, Fermi satellite is sensitive to high energy e
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