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Rubidium Carbonate
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Rubidium-87 (⁸⁷Rb)
Rubidium-87 (⁸⁷Rb)
Rubidium-85 (⁸⁵Rb)
Rubidium-85 (⁸⁵Rb)
Ytterbium-176 (¹⁷⁶Yb)
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Strontium-88 (⁸⁸Sr)
Strontium-88 (⁸⁸Sr)
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Rubidium-87 (⁸⁷Rb) .jpg

Rubidium-87 (⁸⁷Rb) Isotope | China Suppliers & Factory for NMR and Nuclear Research Applications

Essential Nuclear Characteristics of Rubidium-87
Rubidium-87 (⁸⁷Rb) is a naturally occurring radioactive isotope of rubidium, constituting approximately 27.83% of rubidium abundance, with the remainder being the stable isotope ⁸⁵Rb. With an impressive half-life (T₁/₂) of 4.97×10¹⁰ years, this long-lived β⁻ decay nuclide transitions into stable strontium-87 (⁸⁷Sr) while emitting β particles that reach a maximum energy of 283 keV. Rubidium-87 features a nuclear spin of I=3/2 and possesses a substantial nuclear magnetic moment (μ=2.751 μₙ), which enhances its utility in nuclear magnetic resonance (NMR) research. As a trusted choice among China suppliers and factories, Rubidium-87 is ideal for various applications in scientific and industrial research, making it a valuable asset for those in need of high-quality isotopes.

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    Application in geochronology

    The 87Rb-87Sr decay system is one of the important methods of radioactive dating and is suitable for dating ancient rocks (such as granite and meteorites). Its decay constant λ = 1.42 × 10-11 yr-1. By measuring the ratio of 87Sr/86Sr and 87Rb/86Sr, combined with the isochron method, the geological age can be calculated, and the time span can reach billions of years. This technology plays a key role in studying the evolution of the earth's crust, the formation history of the moon and meteorites.

    Atomic physics and quantum technology

    87Rb is one of the core elements of cold atomic physics, and its D2 line (780.24 nm, 52S1/2 → 52P3/2 transition) is a common transition in laser cooling and Bose-Einstein condensation (BEC) experiments. The ground state hyperfine structure (F = 1, 2) of 87Rb can be used for precision measurements, such as atomic clocks (rubidium atomic clock frequency standard ~6.834682 GHz) and quantum simulation experiments. In addition, the Feshbach resonance characteristics of 87Rb make it attract much attention in ultracold molecular preparation and quantum many-body research.

    Medical and tracer applications

    87Rb can be generated by neutron activation of 86Rb (n, γ), and its short-lived isotope 82Rb (T1/2 = 1.27 min) is a myocardial perfusion imaging agent for positron emission tomography (PET) and is used for the diagnosis of coronary heart disease. Although 87Rb itself is not directly used in medicine, its decay chain products (such as 87Sr) have certain reference value in bone metabolism research.

    Nuclear safety and handling

    87Rb has weak radioactivity (specific activity ~3.2 × 10-4 Bq/g), and usually does not require special protection, but long-term exposure to high-concentration 87Rb compounds (such as RbCl) still needs to be avoided from inhalation or ingestion. In the laboratory, 87Rb is often stored in the form of chloride or carbonate and needs to be sealed to prevent moisture.

    Conclusion

    87Rb, as an important long-lived radionuclide, plays an irreplaceable role in geochronology, cold atomic physics and nuclear medicine. Its unique performance in quantum precision measurement technology indicates its potential application value in quantum computing and high-precision sensing in the future.

    Frequently Asked Questions (FAQ)

    Q1: How is 87Rb used to determine the age of ancient rocks?

    A1: Scientists measure the ratios of 87Sr/86Sr and 87Rb/86Sr. By combining these measurements with the isochron method and utilizing the decay constant λ = 1.42 × 10-11 yr-1, they can calculate geological ages spanning billions of years.

    Q2: What role does 87Rb play in atomic clocks?

    A2: The ground state hyperfine structure (F = 1, 2) of 87Rb is used for high-precision measurements in rubidium atomic clocks, which operate at a frequency standard of approximately 6.834682 GHz.

    Q3: Can 87Rb be used directly in medical imaging?

    A3: No, 87Rb itself is not directly used in medicine. However, its short-lived isotope 82Rb (T1/2 = 1.27 min), generated via neutron activation of 86Rb, is used as a myocardial perfusion imaging agent in PET scans to diagnose coronary heart disease.

    Q4: Is 87Rb highly radioactive?

    A4: No, 87Rb has weak radioactivity with a specific activity of approximately 3.2 × 10-4 Bq/g, meaning it generally does not require special protective gear for basic handling.

    Q5: How should 87Rb compounds be stored in a laboratory setting?

    A5: In the laboratory, 87Rb is commonly stored as a chloride or carbonate. It must be kept in sealed containers to protect it from moisture.

    Q6: What is the future potential of 87Rb in technology?

    A6: Due to its unique performance in quantum precision measurement technology, 87Rb has significant potential for future applications in quantum computing and high-precision sensing.

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