Gamma rays are a form of electromagnetic radiation emitted from radioactive substances. They have the shortest wavelengths and highest frequencies of any type of electromagnetic wave. Gamma rays are produced during radioactive decay, electron-positron annihilation, and other nuclear processes. Some key applications of gamma rays include use in radiography, cancer treatment, food sterilization, and nuclear weapons.

1. PHYSICS:
GAMMA RAYS
γ

2. DEFINITION
Gamma-ray is a form of radiant energy from the atom nuclei
emission of radioactive substances or electromagnetic radiation
produced by radioactivity or nuclear or subatomic processes such as
electron-positron annihilation.
GREEK γ

3. THE
SPECTRUM

4. THE WAVE LENGTH AND FREQUENCY OF
GAMMA RAY (AND OTHER RAYS).

5. As we can see from the scheme of rays,
Gamma ray has the most tiny size of
any rays, that is equal to an atomic
has the highest frequency of any
rays ( above 10 exahertz or >1019 Hz), this
caused by the instability of atom (related
with radioactivity), Gamma ray can
penetrate an iron plate because of the
frequency. Besides, Gamma ray has the
shortest wavelength which equals to

6. DISCOVERY OF ONE, GAMMA RAY
ITSELF.
The discovery of gamma radiation from the discovery
made by the French scientist Henri Becquerel, and the
couple, Pierre Curie-Marie Curie in the late 1890s.
They conducted experiments using active ingredients
such as, uranium, polonium, and radium, which led to
the first discovery of radioactivity rays with very high
energy level. Before that, Rontgen had discovered X-
rays and Becquerel saw that the light emitted by the
uranium is similar to X-rays, so he called the light
"metallic phosphorescence."

7. DISCOVERY OF ONE, GAMMA
RAY ITSELF.
Previously, the type of radiation known when it is alpha
and beta radiation, so that their invention is a new type of
radiation that add to the collection radiation made it
known. Radiation was subsequently called gamma
radiation which is composed of particles of high-energy
photons. Gamma radiation has the properties:
• radiation of short wavelength and high frequency
• Do not deflected in a magnetic field
• Energy greatest
• The permeability of the strongest

8. DISCOVERY OF ONE, GAMMA
RAY ITSELF.
Although, it's ironic, in the end many scientists working in the field of
gamma radiation research should suffer as a result of particle radiation.
Naturally, because at that time the radiation protective equipment is still
very low, and scientists do not yet know the consequences for the health
of particle radiation.
To determine the depth of the gamma rays would need to know the
kinds of interactions that occur gamma rays on the material,
• 1. Photoelectric Effect
• 2. Compton Effect
• 3. Production partner

9. The Mechanisms how Gamma ray can be
produced
Gamma rays produced during gamma decay are produced in
conjunction with other forms of radiation such as alpha or beta rays,
and are produced after the other types of decay occur. An excited
nucleus can decay by the emission of an α or β particle. The daughter
nucleus that results is usually left in an excited state. It can then
decay to a lower energy state by emitting a gamma ray photon, in a
process called gamma decay.

10. The Mechanisms how Gamma ray can be
produced
The Occurrence of Gamma-Ray
Gamma-ray () is resulted from the destruction of the merger process of two
high-energy atomic nuclei in atomic nuclei (gamma decay) and high-energy
particle interactions of sub-atomic in natural processes and man made
mechanisms.
Another process of the gamma-ray formation is electron-positron annihilation,
shedding of neutral pion, fusion, fission, lightning, and terrestrial gamma-ray
flashes, also astronomical sources where electrons high-energy are generated.
These electrons then produce secondary gamma-ray.

11. APPLICATION OF GAMMA(-ZING) RAY IN
DAILY LIFE
• Used in radiographic techniques, it is shooting inside an object. The
captured were recorded in the X-ray.
• Used in medicine, namely CT-Scanner (Computed Tomography Scanner)
• Used to cure cancer with Gamma-Knife Surgery
• Used in the sterilization process for biological tissue products
• Used to process plant breeding with mutations techniques in BATAN
• Used as nuclear weapons
• Used to create a sterile insects.
• Used to kill bacteria and viruses in crops and foods

12. GAMMA KNIFE SURGERY…
Gamma-knife is a 'knife' surgery that
uses a gamma-ray to cut or destroy
tissue, because it actually does not use
real knives then called knifeless
surgery. It is known that the gamma-ray
is used in radiation treatment
(radiotherapy) to destroy cancer and
other disorders.

13. The Process of Gamma Knife Surgery
201 radioactive beam were
focused on the target (cancer
cells to be removed) to the
brain to be treated through a
metal helmet. Each beam has a
small effect on brain cells in its
path, but it has a fairly large
dose of radiation to the target
location where all beams were
met.

14. CONCLUSION
•Gamma-ray is a form of energy that has
frequencies between 1020 - 1025 Hz and wave
length ranging is between 10–5 nm to 0.1 nm
•Gamma-ray was discovered by the French
chemist and physicist, Paul Ulrich Villard in
1900, when he was reviewing Uranium.
•The application of gamma-ray is in
medicine, agriculture, weaponry.

15. KASIH.
THANK
YOU.
HATUR
NUHUN.
DANKE.