Beta Rays and Their Transmission in Different Isotopes
ß rays are not transmitted by which one of the isotopes given below?
(A) 14C
(B) 3H
(C) 32P
(D) 125 I
Correct Answer: (D) 125I (Iodine-125)
Understanding Beta (β) Radiation
Beta radiation (β) consists of high-energy electrons or positrons emitted from the nucleus of a radioactive atom during beta decay. There are two types of beta decay:
- Beta-minus (β-) decay: A neutron converts into a proton, releasing an electron and an antineutrino.
- Beta-plus (β+) decay (positron emission): A proton converts into a neutron, releasing a positron and a neutrino.
Beta particles are more penetrating than alpha particles but can be stopped by materials like plastic, glass, or lead.
Beta Emission of Given Isotopes
Let’s analyze the given isotopes:
- 14C(Carbon-14)
- Undergoes β- decay.
- Used in radiocarbon dating.
- Emits low-energy beta particles that can penetrate thin materials.
- 3H(Tritium)
- Undergoes β- decay.
- Used in radioactive labeling and luminescent devices.
- Emits low-energy beta radiation that does not travel far.
- 32P(Phosphorus-32)
- Undergoes β- decay.
- Used in biomedical research and molecular biology (e.g., DNA labeling).
- Emits high-energy beta radiation that requires shielding.
- 125I(Iodine-125)
- Does not emit beta (β) radiation.
- Undergoes electron capture, emitting gamma rays (X-rays) instead.
- Used in medical imaging and radio immunoassays.
Correct Answer: (D) 125I (Iodine-125)
Why?
- Iodine-125 does not emit beta (β) particles; instead, it undergoes electron capture where an electron is absorbed by the nucleus, leading to the emission of gamma rays.
- Other isotopes (14C, 3H, and 32P) all undergo β- decay and emit beta particles.
Conclusion
Among the given isotopes, 125I (Iodine-125) does not transmit beta rays because it undergoes electron capture instead of beta decay. Understanding beta radiation is essential in nuclear medicine, radiochemistry, and molecular biology, where different isotopes serve specific applications based on their emission properties.
39 Comments
Divya rani
August 20, 2025I 125 is not emit the beta particles or radiation because it emits only gamma radiations.
Yogita
August 24, 2025I25 I
Neelam Sharma
August 20, 2025Iodin 125
Dharmpal Swami
August 20, 2025Option d
Khushi Mehra
August 20, 202514C ,3H , 32P all undergoes beta decay but
125I undergoes electron capture and emit gamma rays
Priya khandal
August 20, 2025I125 ok sie
Mohd juber Ali
August 21, 2025Understood by solution
During beta decay beta reys emit from nucleus
125 iodine does not emit beta particles
Remain option emit beta radiation
Meenakshi Choudhary
August 21, 2025Option d is correct
Iodine-125 does not emit beta (β) particles
Khushi Vaishnav
August 21, 2025Iodine-125 does not emit beta radiation
Aman Choudhary
August 21, 2025Option D is correct
Understand by explanation
14C, 3H, and 32P all emit beta particles except 125 I
Aafreen Khan
August 21, 2025Done by explanation
Iodine-125 undergoes electron capture and not beta decay, it does not transmit beta rays
shruti sharma
August 22, 2025iodine-125
Priyanka choudhary
August 22, 2025Right answer is option b,
125_Iodine-125
Soniya Shekhawat
August 23, 2025Iodine 125 is captured the electron in nucleus and the nucleus are the emmiting the gamma rays so I didn’t 125 is does not emitting the beta rays .
Mitali saini
August 23, 2025Correct Answer: (D) 125I (Iodine-125)
Priya dhakad
August 23, 2025Iodine-125 does not emit beta (β) particles instead, it undergoes electron capture where an electron is absorbed by the nucleus, leading to the emission of gamma rays.
Sakshi Kanwar
August 23, 2025Iodine 125 does not emit beta particals
Kajal
August 23, 2025Iodine -125 does not emit beta ray instead of it .it emits Gamma rays…..n remaining three emits beta rays
Arushi Saini
August 24, 2025Iodine 125
Sneha Kumawat
August 24, 2025125i
Aakanksha Sharma
August 24, 2025Iodine 125
Shivani
August 24, 2025Beta rays does not transmitted by Iodine- 125 isotopes .because it does not emit beta particles .
Himanshi
August 24, 2025Iodine-125
Priyanka Verma
August 24, 2025correct answer is 125I
Sonam Saini
August 24, 2025Beta is does not transmitted by iodine 125 isotopes it does not immediate beta practicals
Falguni Prakash
August 24, 2025I125 doesn’t emit beta particles
Kashish yadav
August 25, 2025125I
Kajal
August 25, 2025¹²⁵I
Bhavana kankhedia
August 26, 2025iodine – 125
Priyanka Meena
August 26, 2025125Iodin
Manisha choudhary
August 27, 202512C , 3H ,32P beta ray emmit krte h pr 125I beta ray emmit nhi krte gamma ray emmit krte h
Shriyanshi verma
August 30, 202514C ,3H , 32P all undergoes beta decay but
125I undergoes electron capture and emit gamma rays
Asha Gurzzar
August 30, 2025125I undergoes electron capture and emiit gamma rays not beta
Pratibha Jain
August 30, 2025Correct Answer is option (D) 125I (Iodine-125)
Kirti agarwal
August 30, 2025Iodine 125
Alec
August 30, 2025125I does not capture beta rays because it undergoes electron capture and emit gamma rays.
anjani sharma
August 30, 2025Option d is correct
Iodine-125 does not emit beta (β) particles
Shobha Kanwar
August 31, 2025Correct Answer: (D) 125I (Iodine-125)
Kanica Sunwalka
August 31, 2025I 125 emits only gamma radiation